Please please help helppp
a. Silkworms:
The possible genotype ratio for the offspring of parents CC * cc is 100% Cc, where all offspring will be heterozygous for the yellow cocoon trait. The phenotype ratio will be 100% yellow cocoon, as the dominant C allele will be expressed.
What is codominant?Codominance is a form of inheritance in which both alleles of a gene are expressed equally in the phenotype of a heterozygous individual. In codominance, neither allele is dominant over the other, and both are fully expressed in the phenotype of an individual.
For example, in the ABO blood group system, there are three alleles: A, B, and O. Alleles A and B are codominant, meaning that if an individual has both alleles, they will express both A and B antigens on their red blood cells. If an individual has only one A or B allele, they will express the corresponding antigen on their red blood cells. The O allele is recessive, meaning that it will only be expressed if an individual has two copies of the O allele.
b. Guinea pigs:
The possible genotype ratio for the offspring of parents Ff * ff is 50% Ff and 50% ff. The phenotype ratio will be 50% short fur and 50% white fur, as the dominant F allele will be expressed in Ff individuals and the recessive f allele will be expressed in ff individuals.
c. Mice:
The possible genotype ratio for the offspring of parents Ee * Ee is 25% EE, 50% Ee, and 25% ee. The phenotype ratio will be 75% black eyes and 25% red eyes, as the dominant E allele will be expressed in individuals with EE or Ee genotypes, while the recessive e allele will be expressed in individuals with ee genotype.
d. Four-o-clock plants:
The possible genotype ratio for the offspring of parents ff * Ff is 50% Ff and 50% ff. The phenotype ratio will be 100% pink flowers, as both the dominant F allele and the recessive f allele will be expressed in individuals with Ff genotype, resulting in a codominant pink flower phenotype.
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Silkworms , All of the offspring of parents CC × cc will be heterozygous for the yellow cocoon trait, with a possible genotype ratio of 100 percent Cc.
Because the dominant C allele will be expressed, the phenotype ratio will be 100 percent yellow cocoon.
What defines codominant?Codominance is a type of inheritance in which a heterozygous person's phenotype is the same for both alleles of a gene. In codominance, neither allele is more dominant than the other, and an individual's phenotype fully reflects both.
There are, for example, three alleles in the ABO blood group system: A, B, and O. Alleles A and B are codominant, which means that if a person has both, their red blood cells will express both A and B antigens. Red blood cells will express the corresponding antigen if a person only has one A or B allele. The O allele is recessive, which means that a person can only have two copies of the O allele.
b. Guano Pigs:For the offspring of parents Ff × ff, the possible genotype ratio is 50% Ff and 50% ff. As the dominant F allele will be present in Ff individuals and the recessive F allele will be present in ff individuals, the phenotype ratio will be 50/50 short fur to white fur.
c. Mice:25% EE, 50% Ee, and 25% ee are the possible genotype ratios for the children of Ee × Ee. As the dominant E allele will be expressed in individuals with EE or Ee genotypes and the recessive E allele will be expressed in individuals with ee genotype, the phenotype ratio will be 75% black eyes and 25% red eyes.
d. Plants at four o'clock:The potential genotype ratio for the offspring of parents ff × ff is fifty percent Ff and fifty percent ff. Because individuals with the Ff genotype will express both the dominant F allele and the recessive F allele, resulting in a codominant pink flower phenotype, the phenotype ratio will be 100% pink flowers.
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which cells in a root form a protective barrier to the vascular system where all materials must move through the symplast and prevent water from leaking out under pressure from the stele?
The cells that form a protective barrier to the vascular system of a root and prevent water from leaking out under pressure from the stele are the endodermis cells.
The endodermis cells form a continuous cylinder around the root, known as the endodermic cylinder, through which all materials must pass before reaching the stele. This cylinder is composed of a thick band of tightly packed cells with a waxy cuticle, which prevents water from passing through and maintains pressure in the stele.
The epidermal cells of a root form a protective barrier to the vascular system, where all materials must move through the symplast and prevent water from leaking out under pressure from the stele.
In botany, symplast is a continuum of living plant tissues consisting of the cytoplasm of living cells and the plasmodesmata that interconnect them. This means that the symplast is the living component of the plant, with every living cell containing a part of it that is contiguous with other living cells, forming a continuous cytoplasmic space that extends through the entire plant.
It should be noted that water can be lost through the cuticle and cell wall of root hairs, which is not related to the stele. To prevent water from being lost, the root endodermis, a single layer of cells enclosing the vascular tissue, can be selectively permeable to water, causing it to move into the xylem via the apoplast rather than the symplast, where it can be transported up the plant.
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Two reasons why public participation is important in a democratic society during the pandemic
Before you report this answer! Please read the bolded sentences!
I promise it's not fake or anything like a scam! But if you trust me, you can look up, "Why we need citizens' participation in the time of Corona"
I will copy and paste a paragraph from the site
During the COVID-19 pandemic we witness the increased use of rapid executive decisions by governments, based on scientific advice. What role does that leave for citizens participation? An important one. Because good policy solutions depend on scientific expertise and the lived reality of citizens.
Citizens’ perceptions and concerns are by definition biased, but they represent a reality which is at least as important as the scenarios perceived by scientists. Based on that, I would like to highlight three arguments in particular that underline the importance of active and effective citizens’ participation in the times of Corona.
I really hope this helps!
Public participation is important in a democratic society during the pandemic for several reasons, such as responsiveness and transparency. Public participation in decision-making during the pandemic is important for transparency, accountability, responsiveness, etc.
What is public participation in pandemics?Public participation is crucial for ensuring transparency in the decision-making process during the pandemic. When citizens are involved in the decision-making process, they are better informed about the policies and procedures being implemented to manage the pandemic. This creates a sense of accountability on the part of the government, which is important for maintaining public trust and confidence. Public participation also ensures that the policies and procedures being implemented are responsive to the needs and concerns of the public. When citizens are actively involved in the decision-making process, they are better able to communicate their needs and concerns to the government.
Hence, Public participation is important in a democratic society during the pandemic for several reasons, such as responsiveness and transparency.
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Canine teeth in wolves are a _____ adaptation.
Canine teeth in wolves are a structural adaptation.
Structural adaptation is the evolution of a body part or colouring that aids survival...Canine teeth are a body part thats why it comes under structural adaptationThe rising trend of obesity in adolescents is not only limited to high-income countries, and also increasing in many low to middle-incoming countries in recent years. To estimate the prevelance of obesity among Bangladeshi adolesents, a total of 825 students aged 14-19 years were selected to complete a survey and physical examination. Using definitions from the World Health Organziation, the study found that the prevelance of obesity among surveyed boys was 20.43% and among girls was 7.71%. What type of descriptive study design is this? A. Case report B. Case series C. Cross-sectional D. Ecological
The main causes of childhood obesity are lifestyle factors, such as insufficient exercise and a diet high in calories. Yet, it's possible that hormonal and genetic factors as well. Thus, option C is correct.
What cause obesity in adolescents?In order to evaluate the prevalence of obesity among Bangladeshi teenagers between the ages of 14 and 19 in this study, the survey and physical examination were only completed once.
Although various illnesses and genetics might contribute to obesity in adolescents, inactivity and ingesting more calories than necessary for activity level are the main causes of teenage obesity.
The participants in the trial were not followed over time to monitor changes in their weight or health status.
Therefore, To determine the prevalence of an illness or health condition in a community at a certain moment, cross-sectional studies are frequently performed.
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Please help me?!?!?!
Two resources that bacteria will need to complete for as the population grows are : C. Space D. Food
What is bacteria?Bacteria are ubiquitous, free-living organisms and often consisting of one biological cell.
The bacteria will need food and space as the population grows larger. While light and oxygen may be important for some types of bacteria, the question specifies that bacteria are growing on a gel that provides nutrients, so it's safe to assume that they already have access to the necessary nutrients.
As the population of bacteria grows, they will need more space to spread out and access to more food to sustain their increased metabolism and growth. Oxygen may also become a limiting factor if population becomes too dense and uses up the available oxygen in Petri dish.
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ESSAY: MEDICAL SCIENCE
PLEASE HELP ME I SUCK AT THESE 100 POINTS!! WRITE ME AN ACTUAL ESSAY PLEASE
— research a part of the field of medicine. Select a general area of study from the following suggested topics. Then select a specific topic for detailed research. Write for information to medical associations such as the Arthritis Foundation, National Tuberculosis Association, or National Kidney Foundation.
— The product of your research will be a 1000 word report. Your report should contain:
1. Title page
2. Table of contents
3. Introduction (stating your reason for choosing this particular topic and some questions you expect to answer during your research)
4. Body of information--including pictures, drawings, and charts, if applicable
5. Summary--list ten major facts you learn, including answers to questions you had asked and conclusions you reach
6. Bibliography
below is a list of topics
Answer:
Introduction:
The field of medicine is vast and diverse, with numerous areas of study that are constantly evolving. One area of study that has gained significant attention in recent years is the field of immunology. Immunology is the study of the immune system and its response to various diseases and infections. In this report, we will explore the specific topic of autoimmune diseases, which are conditions in which the immune system attacks healthy cells in the body.
Body of Information:
Autoimmune diseases are a group of disorders that occur when the immune system mistakenly attacks healthy cells in the body. There are over 80 different types of autoimmune diseases, including rheumatoid arthritis, lupus, multiple sclerosis, and type 1 diabetes. These diseases can affect any part of the body, including the skin, joints, muscles, and organs.
The exact cause of autoimmune diseases is not yet fully understood, but it is believed to be a combination of genetic and environmental factors. Some autoimmune diseases are more common in certain ethnic groups, suggesting a genetic component. Environmental factors such as infections, toxins, and stress can also trigger autoimmune diseases in susceptible individuals.
Diagnosis of autoimmune diseases can be challenging, as symptoms can vary widely and may mimic other conditions. Blood tests, imaging studies, and biopsies are often used to diagnose autoimmune diseases. Treatment options for autoimmune diseases include medications to suppress the immune system, as well as lifestyle changes such as diet and exercise.
One area of research in autoimmune diseases is the development of new treatments that target specific components of the immune system. For example, biologic drugs that target specific immune cells or proteins have been developed for the treatment of rheumatoid arthritis and other autoimmune diseases. Stem cell therapy is also being investigated as a potential treatment for autoimmune diseases.
Summary:
Through our research on autoimmune diseases, we have learned several key facts. First, autoimmune diseases are a group of disorders in which the immune system attacks healthy cells in the body. Second, there are over 80 different types of autoimmune diseases, which can affect any part of the body. Third, the exact cause of autoimmune diseases is not yet fully understood, but it is believed to be a combination of genetic and environmental factors. Fourth, diagnosis of autoimmune diseases can be challenging, and treatment options include medications to suppress the immune system and lifestyle changes. Finally, ongoing research is focused on developing new treatments that target specific components of the immune system.
Bibliography:
1. American Autoimmune Related Diseases Association. (2021). Autoimmune Diseases. Retrieved from https://www.aarda.org/diseaselist/
2. National Institute of Allergy and Infectious Diseases. (2021). Autoimmune Diseases. Retrieved from https://www.niaid.nih.gov/diseases-conditions/autoimmune-diseases
3. Mayo Clinic. (2021). Autoimmune Diseases. Retrieved from https://www.mayoclinic.org/diseases-conditions/autoimmune-diseases/symptoms-causes/syc-203 autoimmune diseases.
List changes that occur in the cell during metaphase.
The changes that occur during metaphase are highlighted in the section below in detail.
Changes that occur during metaphaseDuring metaphase, the spindle fibers attach to the centromeres of the chromosomes and align them in the center of the cell, the nuclear envelope breaks down, and microtubules move the chromosomes to opposite poles of the cell.
The centrosomes move to opposite poles of the cell, the kinetochores of the chromosomes attach to the spindle fibers, the chromosomes condense and become visible, and the asters form around the centrosomes.
In conclusion, the chromosomes are at their second-most compacted and coiled state during the mitotic phase of the eukaryotic cell cycle, known as metaphase.
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Please answer the question in the image.
Answer:
blood clotting
Explanation:
Sweating and shivering are negative feedback, your coach complimenting you has nothing to do with homeostasis ;)
which embryonic structure produces human chorionic gonadotropin (hcg)? which embryonic structure produces human chorionic gonadotropin (hcg)? the cytotrophoblast the syncytiotrophoblast the hypoblast the epiblast
The embryonic structure that produces human chorionic gonadotropin (HCG) is the syncytiotrophoblast.
Human chorionic gonadotropin (HCG) is a hormone that is produced in large quantities during pregnancy. The syncytiotrophoblast is a structure found in the placenta that is responsible for producing and secreting HCG. HCG is produced by the syncytiotrophoblast soon after the implantation of the fertilized egg in the uterus.
It is important for the maintenance of pregnancy and plays a crucial role in early pregnancy. It helps to regulate the levels of other hormones like estrogen and progesterone that are essential for pregnancy. HCG levels in the blood and urine are used to confirm pregnancy and to monitor the health of the developing fetus.
So, the correct answer is the syncytiotrophoblast.
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in a peach orchard 40% of all trees yield yellow fruit and 30% of all trees yield fuzzy fruit assuming independent assortment how many trees in an orchard of 100 will produce fruit that is red and hairless
Simply put, probability is the likelihood that something will occur. When we don't know how an event will turn out, we might discuss the likelihood or likelihood of several outcomes.
Yellow fruit = 40%
Red fruit = 100-40
= 60%
= 0.6
Fuzzy fruit = 30%
Hairless fruit = 100-30
= 70%
= 0.7
The probability for red and hairless fruit = 0.6*0.7
= 0.42
= 42%
The number for red and hairless fruit = 100*0.42
= 42
The probability is often defined as the proportion of positive outcomes to all outcomes in the sample space. Probability of an event P(E) = (Number of positive outcomes) is how it is stated (Sample space).
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humans have unique spines among mammals due to our bipedalism. the s-curved spine results in many humans experiencing back pain. what are two of the back problems, mentioned by shubin, that humans commonly experience?
Humans have an S-shaped spine, which is unique to mammals due to bipedalism. This S-shaped spine results in many humans experiencing back pain.
According to Shubin, two common back problems humans experience are sciatica and spondylolisthesis. Sciatica is a condition caused by a herniated disk in the lower back that puts pressure on the sciatic nerve and causes pain and numbness in the leg and buttocks. Spondylolisthesis is a condition where one vertebra slips over the vertebra beneath it, leading to pain in the lower back and buttocks.
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infer the consequence for evolution if speices did not vary
Answer:
---poses a risk of extinction when environments are unstable.
Explanation:
-Having no variation within species poses a risk of extinction when environments are unstable. If species did not vary or there are no differences in traits exhibited among the populations, then by definition there is no evolution, as evolution refers to the change in allelic frequency in a given population.
most psychoneuroimmunologists are likely to share the view that: group of answer choices the immune system works completely independently of other body systems. there are interconnections among psychological processes, the nervous system, and the immune system. the endocrine system works completely independently of other body systems. there are no direct connections between the brain and the immune system, only indirect connections.
Most psychoneuroimmunologists would likely agree that the immune system works in close conjunction with other body systems.
Psychological processes, the nervous system, and the immune system are interconnected, with the brain and the immune system having both direct and indirect connections.
The fields of psychology, neuroscience, and immunology have all provided evidence that psychological and neurological factors can influence the functioning of the immune system and vice versa. Psychological factors, such as stress and mood, have been linked to a variety of physiological reactions in the body, including inflammation and changes in immune function. This indicates that psychological processes and the nervous system may play a role in immune function modulation.
This interdisciplinary approach has led to the development of the field of psychoneuroimmunology, which studies the complex interactions among these systems.
Psychoneuroimmunology is the study of the impact of psychological and social factors on the immune system and the body's response to disease. The concept of psychoneuroimmunology has emerged as a result of recent developments in neuroimmunology, which is the study of the nervous system and the immune system's interactions.
Therefore, they will most likely not agree that the immune system works completely independently of other body systems or that there are no direct connections between the brain and the immune system, only indirect ones. The endocrine system and the immune system also interact with one another, and there is a growing body of research on the role of hormones such as cortisol and epinephrine in immune system function.
Thus, psychoneuroimmunologists may not agree that the endocrine system works completely independently of other body systems.
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you are an employee of the environmental protection agency. you are given the task of conducting risk management for spraying insecticides to kill the mosquitoes that carry west nile virus. how might you determine the proper concentration needed to kill mosquitoes? apes
To determine the proper concentration of insecticides needed to kill mosquitoes, you should consider: the type of insecticide being used, the characteristics of the environment in which it will be used, and the intended result.
First, research the type of insecticide that is most effective at killing mosquitoes that carry the West Nile virus. It is important to understand the properties of the insecticide in order to assess how it will interact with the environment.
Next, consider the environmental characteristics, such as the size of the area being treated, the amount of wind or sun exposure, and the presence of other organisms in the area. Finally, set the appropriate concentration of insecticides that is necessary to achieve the desired result: killing the mosquitoes that carry the West Nile virus.
It is important to keep in mind that the concentration needed to kill mosquitoes should not be excessive and should not cause harm to other organisms in the environment.
Therefore, it is critical to closely monitor the insecticide concentration in order to ensure that it is at an appropriate level. Additionally, it is important to assess the effectiveness of the insecticides and make changes as needed.
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16% of a population is unable to taste the chemical ptc. these non-tasters are recessive for the tasting gene. what percentage of the population are heterozygous for the trait?
16% of the population are non-tasters and are recessive for the tasting gene. This means that 48% of the population is either homozygous for the trait (able to taste the chemical PTC) or heterozygous for the trait (able to taste the chemical PTC but carrying a recessive gene). Therefore, the percentage of the population that is heterozygous for the trait is 48%.
If 16% of a population is unable to taste the chemical PTC, then the frequency of the recessive allele (t) in the population can be calculated using the Hardy-Weinberg equation:
[tex]p^{2} + 2pq + q^{2} = 1[/tex]
where p is the frequency of the dominant allele (T) and q is the frequency of the recessive allele (t).
Since the non-tasters are homozygous recessive (tt), we know that:
[tex]q^{2}[/tex] = 0.16
Taking the square root of both sides gives:
q = [tex]\sqrt{0.16}[/tex] = 0.4
Now, we can use the equation to calculate the frequency of the heterozygous genotype (Tt):
2pq = 2(0.6)(0.4) = 0.48
Therefore, approximately 48% of the population is heterozygous for the trait.
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in which situation is the principle of cross cutting relationships useful in determining relative age?
From oldest to youngest, the rock layers are A, B, and C, with the fault and igneous intrusion cutting through them afterwards.
How is relative dating utilizing cross-cutting relationships?The Principle of Cross-cutting Relationships, which holds that rock formations that cut across other rocks must be younger than the rocks they cut over, is another essential component of relative dating. This idea makes sense when considering the formation of rocks.
What is the cross-cutting relationship's guiding principle?The geologic structure that crosses another structure is considered to be younger than the structure it crosses, according to the cross-cutting relationships principle.
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What makes physical properties different from chemical properties?
Choose the correct answer
O
A) Physical properties relate to elements rather than compounds
B) Physical properties appear only after a chemical change occurs.
C) Physical properties describe elements in the solid state rather than in the liquid or gas state
D) Physical properties can be observed without attempting to change the identity of the substance
Answer:
B Physical properties appear only after a chemical change occurs.
Explanation:
Ap environmental science when a rain forest is slashed and burned, the local concentration of carbon dioxide in the atmosphere increases. This is primarily due to
2. Determina el esfuerzo en un resorte con un módulo de Young equivalente a 300 Pascales, si su deformación es de 30.
Alguien me ayuda urgente
The stress in spring with Young's modulus is equivalent to 300 Pascals, given that its deformation is 30. The stress in the spring is 9000 Pascals.
Firstly, it's important to note that stress and deformation are related to each other through Hooke's law, which states that stress is proportional to deformation for a linearly elastic material like a spring.
Mathematically, this can be represented as:
Stress = Young's modulus × Deformation
Substituting the given values into the equation, we get:
Stress = 300 Pa × 30
Stress = 9000 Pa
It's important to note that stress is a measure of force per unit area, so it's important to specify the cross-sectional area of the spring to fully define the stress. Additionally, the units of stress can vary depending on the system of units used, but in this case, Pascals are used, which are the SI units of stress.
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Complete question:
Determine the stress in a spring with Young's modulus equal to 300 Pascals, if its deformation is 30.
1. Determine the direction in which the blood was traveling
The direction of blood travel can be determined by the “tail”, or “cast-off wave” of the blood stain on a surface. Examining the direction of bloodstain is called Blood Pattern Analysis (BPA).
The angle of blood stain can be demarcated by a Swipe pattern, Splatter pattern, or Wipe pattern on transferring to an examination slide with a chemiluminescent dye. The said patterns point out the blood direction and the assault committed in the following steps:
• A characteristic tail pattern is formed on the application of chemical dye on the blood stain which points to the direction of the blood drops.
• The steeper the angle of the tail, the greater the force applied on the victim measured by sine values.
• The splatters indicate enormous force applied on the victim, that impacts through the air before landing on a surface.
• Transfer patterns are medium-force assaults when blood soaks on direct contact between surfaces.
• The Wipe patterns are low-velocity assaults and show large blood drops than the other two mentioned above.
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How to determine in which direction the blood was traveling with the help of a blood stain?
which of the following describes a cytotoxic autoimmune reaction? group of answer choices immune complexes form. antibodies react to cell-surface antigens. it is mediated by t-cells. antibodies are not made. cells are killed.
A cytotoxic autoimmune reaction is described as "cells are killed."
The immune system protects the body from external agents that can cause harm by targeting and removing them.
The immune system's function is to recognize foreign organisms and molecules, such as bacteria, viruses, fungi, and toxins, and respond to them by producing an immune response or immunologic memory.
A cytotoxic autoimmune response is a type of autoimmune response. The immune system mistakenly attacks and kills the body's cells in this reaction.
This condition causes an inflammatory reaction, which can cause tissue damage and a variety of symptoms. It may lead to the destruction of healthy cells if the immune system perceives them as foreign or dangerous.
As a result, the immune system's T-cells and antibodies attack the body's own cells.
Therefore, the correct option that describes a cytotoxic autoimmune reaction is "cells are killed."
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analyze the link between self-development, confidence and ideal self.
as identical twins, kijana and elroi share what percentage of their segregating genes? group of answer choices
Identical twins are considered natural clones since they emerge from the same zygote and share the same genetic material. D) Kijana and Elroi share 100% of their segregating genes.
What are identical twins?Identical twins emerge after the division of an ovule fertilized by a sperm cell. This is, fertilization occurs first, and then the division of the diploid cells.
The fertilized diploid cell suffers a division, separate, and two identical cells are created carrying the same genetic material. Each of them will then suffer successive mitosis and develop a new individual.
As a result, identical twins always have the same genome and the same sex. The genetic sequences in the identical twins' genome are almost identical and minimum.
These identical twins are also known as monozygotic twins and are said to be natural clones.
Option D. Kijana and Elroi share 100% of their segregating genes.
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As identical twins, kijana and elroi share what percentage of their segregating genes? group of answer choices a. 25% b. 50% c. 75% d. 100%
in massively parallel sequencing techniques, the dna to be sequenced is sheared into small pieces and small oligonucleotides called adapters are attached to the ends of the dna fragments. these adapters function to blank and blank . multiple select question. anneal to a pcr primer attach the dna fragment to taq polymerase attach the dna fragment to a solid substrate produce the dntps required in the reaction
In massively parallel sequencing techniques, the DNA to be sequenced is sheared into small pieces and small oligonucleotides called adapters are attached to the ends of the DNA fragments. These adapters serve two primary functions: to anneal to a PCR primer and to attach the DNA fragment to a solid substrate.
The adapters anneal to the PCR primers, which allows for the replication of the DNA fragment during the polymerase chain reaction (PCR). This PCR amplification step helps increase the number of copies of the DNA fragment so that it can be more easily sequenced.
The adapters also attach the DNA fragments to a solid substrate. This substrate could be a glass plate, an array, or beads, which allow for the physical separation of the DNA fragments during the sequencing process.
Therefore, the correct options for the blanks are Anneal to a PCR primer and Attach the DNA fragment to a solid substrate.
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According to the passage all BUT ONE is a reason to classify viruses as living. That is they A) are capable of protein synthesis. B) contain a nucleic acid, DNA or RNA. C) response to changes in the environment. D) lack mechanisms for metabolic function
According to the passage, Option D: lack mechanisms for metabolic function is the reason why viruses are considered as living.
A virus is an infectious submicroscopic creature that only reproduces inside of live cells. All kinds of life, including plants, animals, and microbes like bacteria and archaea, are infected by viruses. It cannot be considered living so far as it lacks metabolic function.
The primary criteria used to classify viruses are features of the viral particles themselves, such as the form of the capsid, the kind of nucleic acid (DNA or RNA, double or single stranded), the replication process, the host species they infect, or the disease they cause.
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Complete question is:
Scientific researchers discovered agents that behaved like bacteria causing diseases such as rabies and hoof-and-mouth, but were much smaller. At this time it became the general view that viruses were biologically "alive." This changed in 1935 when the tobacco mosaic virus was crystallized and scientists demonstrated that the particles lacked any mechanisms necessary for metabolic function. It was determined that viruses consisted of a nucleic acid, DNA or RNA, surrounded by a protein shell and the scientific view changed: viruses are complex biochemical mechanisms but not alive. When not in contact with a host, the virus remains dormant. During this time there are no biological activities occurring and the virus is nothing more than a static organic particle. In this state viruses can remain for extended periods of time, waiting to come into contact with the appropriate host. When in contact with a host, it becomes active, reacts to its environment and/or host and directs its efforts toward self-replication. The viral goal now is to produce more viruses to attack host cells.
According to the passage all BUT ONE is a reason to classify viruses as living. That is they A) are capable of protein synthesis. B) contain a nucleic acid, DNA or RNA. C) response to changes in the environment. D) lack mechanisms for metabolic function
I need help on biology will make u brainiest
Which phrase best completes the sentence?
According to the modern synthesis of evolution, __________.
Responses
only populations of identical individuals can evolve
species do not descend from common ancestors
the processes seen on earth today are the same ones that took place long ago
genetics and mutation generate some of the variety that natural selection acts on
Answer:D
Explanation: Genetics are often times how creatures adapt to their environment and often times start as mutations that just work, therefore protecting an organism from a death from natural selection.
2. If 12,000 Btu of coal energy costs $, 25arewhat are your total energy costs for the year? (Hint: Divide your full power in Btu by 12,000. Then multiply the value by $25.)
Answer:
300,000
Explanation:
because 12,000 X25
Someone help me please
The feedback mechanism of hormone release is a regulatory process by which the production and release of hormones such as estrogen and progesterone are controlled in response to changes in the body's internal and external environment.
What is the feedback mechanism of hormone release?Increased levels of estrogen and progesterone will result in positive feedback to the anterior pituitary to increase LH and FSH production. This normally occurs during the follicular stage.
Low levels of estrogen and progesterone will result in negative feedback to the hypothalamus to decrease GnRH production. This normally occurs during the luteal stage.
Extremely high levels of estrogen near the end of the follicular phase will result in positive feedback to the hypothalamus and anterior pituitary to release a large amount of LH to trigger ovulation.
Some hormones are used in oral contraceptive pills to suppress the release of FSH and LH. Without FSH, immature follicles do not develop into a mature ovum, and without LH, a mature ovum is not released into the Fallopian tube.
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Complete question:
Drag and drop the missing words from the list below to complete the following sentences. Words may be used more than once.
Increased levels of estrogen and progesterone will result in ____ feedback to the anterior pituitary to ____ _____
production. This normally occurs during the ____
Low levels of estrogen and progesterone will result in ____ feedback to the hypothalamus to _____ _____
production. This normally occurs during the _____
Extremely high levels of estrogen near the end of the follicular phase will result in ____ feedback to the hypothalamus and anterior pituitary to release a large amount of ____ to trigger ovulation.
Some hormones are used in oral contraceptive pills to suppress the release of ____ without ____ a mature ovum is not released into the Fallopian tube and without ____ immature follicles do not develop into a mature ovum.
negative
positive
increase
decrease
LH
FSH
LH and FSH
GnRH
follicular stage
luteal stage
can someone answer and explain why?
Answer:
The answer is A. Container 1.
Explanation:
Based on the data provided, Container 1 is most likely the one in which photosynthesis was not occurring. This is because the amount of CO2 remaining in Container 1 after 2 days was 100 cubic centimeters, which is the highest amount of CO2 remaining among all four containers. This suggests that the plants in Container 1 did not use as much CO2 for photosynthesis as the plants in the other containers, indicating that photosynthesis was likely not occurring at the same rate as in the other containers. The other containers all had less CO2 remaining, suggesting that photosynthesis was occurring more efficiently in those containers.
Why is it A? Container 1 is where the plant probably didn't do photosynthesis because it had the most CO2 left after 2 days, while the other containers had less CO2 left. This means that the plant in Container 1 did not use as much CO2 for photosynthesis as the plants in the other containers, suggesting that photosynthesis was not occurring at the same rate as in the other containers.
Hope this helps!! :]