Answer: Robert Hokke.
Explanation: Robert Hokke in 1665, the cell has a rich and interesting history that has ultimately given way to many of today's scientific advancements.
Hope this answer will help you.
A scientist carried out an experiment to follow the movement of carbon atoms within animal cells. To do this, the scientist added glucose with radioactively labeled carbon atoms to a culture of cells growing in a Petri dish.
After a certain amount of time had passed, the scientist tested parts of cells for radioactivity. Radioactivity was detected in various biomolecules, including DNA.
Which of the following statements best explains why radioactivity was detected in the DNA?
Choose 1 answer:
(Choice A)
The DNA was in close proximity to the radioactive glucose during its formation.
(Choice B)
Carbon atoms that were once in the radioactively labeled glucose were used to form DNA.
(Choice C)
The DNA was made up of radioactively labeled glucose subunits.
Carbon atoms that were once in the radioactively labeled glucose were used to form DNA - this statement best explains why radioactivity was detected in the DNA.
What is radioactivity in DNA?Radioactivity is known to induce tumors, chromosome lesions, and minisatellite length mutations.
Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions.
The radiation could damage the cell’s DNA, but the DNA repairs itself. The radiation could prevent the DNA from replicating correctly. The radiation could damage the DNA so badly that the cell dies.
The correct answer is option B.
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Answer:
the answer is b - carbon atoms that were once in the radioactively labeled glucose were used to form DNA
hope this helps! <3
how do monosaccharides combine to form polysaccharides
What is the average beak depth of the current finch population?
What happens to the cell's
genetic information during the cell cycle?
Answer:
Mitosis results in two nuclei that are identical to the original nucleus. So, the two new cells formed after cell division have the same genetic material. During mitosis, chromosomes condense from chromatin. ... At the end of mitosis, the cell has two identical sets of chromosomes in two separate nuclei.
Explanation:
69. Plants transform energy from the sun
into
A nuclear energy
B chemical energy.
C visible light.
D steam.
Answer:
B. chemical energy
Explanation:
5
Which three organ systems are directly interacting when a person's brain sends a signal to the person's arm, causing the arm to
move up and down?
OA. muscular system, nervous system, skeletal system
ОВ.
nervous system, urinary system, skeletal system
OC. circulatory system, muscular system, respiratory system
OD. circulatory system, muscular system, skeletal system
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Answer:
A bc it moves the bones in the arm and the muscles and the nerves are what send the signals to the muscles to move
3. Carbon can form __________________ covalent bonds.
4. Covalent bonds are between ___________ and ___________. (metals or nonmetals)
5. Polar covalent bonds ___________________ (do/do not) share electrons equally.
6. Nonpolar covalent bonds___________________ (do/do not) share electrons equally.
7. Define Isomer:
8. What is vitalism? Who disproved it and how?
Monomer
Elements Found
9. Define metabolism, anabolism, and catabolism
What do you call a substance with a pH of 6?
Answer:
i copied this i just hope it helps if not i dont know
Explanation:
pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. ... Water with a pH of five is ten times more acidic than water having a pH of six. As this diagram shows, pH ranges from 0 to 14, with 7 being neutral. pHs less than 7 are acidic while pHs greater than 7 are alkaline
Why are enzymes important in digestion?
A. They allow reactions to occur rapidly and at
body temperature.
B. They change inorganic compounds into organic
ones.
C. They let reactions repeat without energy.
D. They control photosynthetic processes.
Answer:
A. They allow reactions to occur rapidly and at
body temperature.
I hope this helps you
what is happening in the convection layer of the Sun
Answer:
In the convective zone, the temperatures are cool enough—under 1,800,000 degrees Fahrenheit (1,000,000 degrees Kelvin)—that the atoms in the plasma there can absorb the photons coming outward from the Sun's radiative zone. The plasma gets very hot, and begins to rise upward out of the Sun.
Need help ASAP with this answer
Answer:
C.
Explanation:
Animals found in the tundra include the musk ox, the Arctic hare, the polar bear, the Arctic fox, the caribou, and the snowy owl. Many animals that live in the tundra, like the caribou and the semipalmated plover, migrate to warmer climates during the winter.
I hopes it's help :)
Which of the following strategies would likely be part of a system of integrated pest management in a restaurant kitchen?
Sealing cracks in walls and placing screens over windows
Scattering small quantities of poison along exterior of restaurant
Trapping pests in mechanical devices and releasing them far from the restaurant
A) I and II only
B) I and III only
C) I, II, and III
Which energy technology is more sustainable long term?
Answer:
Wind power
Harnessing power from the wind is one of the cleanest and most sustainable ways to generate electricity as it produces no toxic pollution or global warming emissions. Wind is also abundant, inexhaustible, and affordable, which makes it a viable and large-scale alternative to fossil fuels.
Explanation:
I hope it's help :)
Answer:
Wind power
Explanation:
getting power from the wind is one of the cleanest and most sustainable ways to generate electricity.
Energy flow in an ecosystem is best represented by _______.
22. Where does most metamorphic rock
form?
A at Earth's surface
B in volcanoes
C in ocean waters
D deep underground
Explanation:
Most metamorphic rocks form deep below the Earth's surface. These rocks are formed from either igneous or sedimentary rocks, making them a changed...
please help me i need a long answer on this its biology
Answer:
Pituitary. The pituitary gland is located below the brain. Usually no larger than a pea, the gland controls many functions of the other endocrine glands.
what substances are the reactants in photosynthesis
Answer:
The reactants of photosynthesis are everything to the left of the "———>" arrow, thus the reactants of photosynthesis are carbon dioxide, water, and sunlight energy.
The products of photosynthesis are everything to the right of the "———>" arrow, thus the products of photosynthesis are glucose and oxygen.
What is photosynthesis???
By definition, photosynthesis is a metabolic process carried out by certain cells of autotrophic organisms, that is, those that have the capacity to make their own food, such as plants.
With this process, plants capture the energy of sunlight and transform it into chemical energy, to produce organic matter.
Photosynthesis takes place in 2 stages:
In the first stage the plants absorb water from the soil through the roots. Through their stems they transport it to their leaves. In these it meets the sunlight captured by chlorophyll, which breaks the water molecule, separating hydrogen (H) from oxygen (O₂). The other stage is capturing carbon dioxide. This provides the carbon and oxygen atoms that, together with hydrogen and stored energy, will form the glucose molecule, from which compounds are produced that are the basis of food for plants and other living beings.Then, sunlight, carbon dioxide and water are needed for the photosyntesis, while oxygen is released to the environment.
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brainly.com/question/13523854?referrer=searchResults brainly.com/question/13523849?referrer=searchResults brainly.com/question/873199?referrer=searchResultsDNA and RNA are ______ that serve as templates that form proteins
Answer:
In the first step, the information in DNA is
transferred to a messenger RNA (mRNA)
molecule by way of a process called
transcription.... The mRNA sequence is
thus used as a template to assemble-in
order-the chain of amino acids that form a
protein.
A type of RNA that is called as ribonucleic acid type called as transfer RNA that is used for the production of the amino acid at a time and the protein assembly takes place at the ribosomes.
What is the role of DNA and RNA for the sake of protein synthesis ?
DNA are responsible for the providing out the code for the cell's activities and the RNA are responsible for providing out the service to make them proteins.
Each group of 3 bases in the mRNA constitutes a codon and each codon is specifying a particular type of amino acid. The mRNA sequence therefore used as a template to make the assembly in order of the chain of amino acids which form a protein.
It is found that in all biological cells , usually occurs in cytoplasm of cell though its production takes place in nucleus. Whereas DNA is providing the code for cell's activities and RNA is responsible for converting that code into proteins which carry various cellular functions.
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HURRY 50 POINTS
Define trawling, and explain the ecological damage associated with it.
DO NOT COPY AND PACE PLZ
Answer:If we are talking the word it means, fishing with a trawl net or seine, or, sifting through as part of speech. if it isnt the word then i dont know:(
Explanation:
How do we know that the ocean is continually absorbing carbon from the atmosphere, helping with climate stability?
O Increased carbon in the oceans have made them more acidic.
O Ocean pH has increased significantly in the last decade.
O There are bubbles like carbonation on the ocean surface.
O Fish we catch and eat from the ocean are made of carbon.
The concentration of carbon is increased in the oceans have made them more acidic.
Increased carbon concentration in the oceans which have made the ocean water more acidic is the indication that more carbon is absorbed by the ocean. When carbon absorbed by the ocean, the carbon reacts with water which produced carbonic acid.
This carbonic acid decrease the pH of the ocean water that adversely affect the marine organisms especially coral reefs. When the pH of the ocean water increases, bleaching of coral reef occurs because the algae living on them die so we can conclude that the concentration of carbon is increased in the oceans have made them more acidic.
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Learn more: https://brainly.com/question/25941324
Answer:
A
Explanation:
Increased carbon in the oceans has made them more acidic.
PLEASE IN DESPERATE NEED OF HELP!
Cell Division Virtual Lab Activity
Instructions: The Virtual Cell Division Lab is on the lesson assessment page. On the image, it says “Click Anywhere to Start.” Follow the instructions as you move through the lab. The lab activity will keep count of your data on the right, and you can record this into the data table.
Title: Cell cycle
Objective(s):
Hypothesis:
Variables:
Data:
Record the number of cells you observed in the lab activity.
Stages
Number of Cells
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Observations:
Record any observations about the cells you observed. What does the cell look like for each stage? What is a distinguishing visible feature of each stage of the cell cycle?
Stages
Description of Cell
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Data Analysis:
Part 1: Calculate the percentage of the cell cycle spent in each stage. Number of cells in given stage ÷ total number of cells counted × 100 = % of the cell cycle spent in this stage
Part 2: Using your percentages in part 1, create a graph that represents the time spent in each stage of the cell cycle.
Insert Chart [Hint: don’t forget to consider the relationship between your data and the type of chart to best represent your data]
Conclusion:
Be sure to answer the following reflection questions as a summary in the conclusion of your lab report:
Was your hypothesis correct? Why or why not? Be sure to include evidence from the data you collected to support your conclusion.
Based on your data, what can you infer about the length of time spent in each stage of the cell cycle?
What stages were the longest and shortest? Give a brief explanation of why these stages may have that time period.
Questions:
Using what you have learned in the lesson and the virtual lab activity, answer the following questions in complete sentences.
What differences can you see when you compare the nucleus of a dividing cell with that of a non-dividing cell?
If your observation had not been restricted to the tip of the onion root, how would the results be different?
The distinguishing visible features of each stage of the cell cycle include chromosome condensation, mitotic spindle, equatorial plate and formation of two cells.
What is the cell cycle?The cell cycle is a series of well-defined steps in the life of a cell that begins with cell growth and end with its division.
The cell division has a series of steps that may be classified according to the phenomena that occur in these phases.
For example, chromosomes condense during the first stage of cell division (prophase), where they migrate to the equatorial plate at metaphase.
In conclusion, the distinguishing visible features of each stage of the cell cycle include chromosome condensation, mitotic spindle, equatorial plate and formation of two cells.
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A peacock spreading its tail to attract a mate is sending a(n) _____ stimulus. learned innate external internal
Answer:
External
Explanation:
The Tail is spreading outside of the peacock (Externally)
Answer the following for 20 points
What is the name of the column of neurons within the medulla that initiates neural impulses for inspiration and expiration
What are three main ways that cells maintain control over division
Answer:
Well if cells didn't have any control over what they do, the cells in the different stages of mitosis could ignite a genetic mutation of DNA and how the cells could react to different forms of treatment.
Explanation:
Hope this helps.
Answer:
the growth and repair of tissues in multicellular animals,the formation of gametes for reproduction in multicellular animals. the reproduction of an entire unicellular organism,Explanation:
Which of the following best predicts the effect of not having ATP available to supply energy to this
process?
A. H+ ions will stop moving through the protein.
B. H+ ions will move in the other direction through the protein.
C. H+ ions will continue to move through the protein in the original direction but at a slower rate.
D. H+ ions will begin to move through the phospholipid portion of the membrane in the original direction.
H+ ions will stop moving through the protein is the effect of not having ATP
available to supply energy to this process.
ATP is the form of energy used by cells and it ensures that cells perform their
daily activities optimally. ATP is needed in a lot of metabolic reactions and
transportation of materials within cells.
When there is a lack of ATP, it means there is no energy required to
transport or move substances within a cell. This means that the H+ ions will
stop moving through the protein and is the most appropriate choice.
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what are some non-renewable sources of energy?
~ Thanks!
Answer:
coal, petroleum
Explanation:
they are obtained as dead organic substances fall into swamps and after a long period of time they decay into substances that can be used as fuel after refining process.
Answer:
Non-renewable energy is energy from fossil fuels such as coal, crude oil, natural gas, and uranium.
Explanation:
which of the following hormones produced in the anterior pituitary stimulates the production of progesterone and estrogen by ovaries and is needed for ovulation?
Luteinizing hormone stimulates the corpus luteum to produce progesterone, which is required to support the early stages of pregnancy, if fertilization occurs.
what are the role of Luteinizing hormone ?These hormone are released from ductless Endocrine cells which release their secretion i.e., hormones directly into blood.
The FSH (follicle stimulating hormone) is secreted by pituitary gland which helps in controlling menstrual cycle and stimulation of ovaries for egg production.
The hormone LH (Luteinizing hormone) is secreted from pituitary gland, helps in physical development and maintaining pregnancy.
Thus, both FSH and LH are produces by pituitary gland and their functions are to control menstrual cycle and maintaining pregnancy respectively.
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The periosteum and the endosteum are both membranes.
a.
True
b. False