(1) A message travels from the nervous system to the muscular system, triggering chemical reactions.
(2) The chemical reactions lead to the muscle fibers reorganizing themselves in a way that shortens the muscle--that’s the contraction.
(3) When the nervous system signal is no longer present, the chemical process reverses, and the muscle fibers rearrange again and the muscle relaxes.
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Ava has been reading about the interactions among the components of the Earth. This group of components work together to make a/an ____
The group of components of the Earth work together to make an environment we live in.
What are the different components of the Earth?The interactions between Earth's five systems—the geosphere, biosphere, cryosphere, hydrosphere, and atmosphere—create the environment we are accustomed to.
The Earth's interior and surface, which are both formed of rocks, make up the first system, the geosphere. The second system is made up of the little area of the planet that may sustain life; this area is known as the biosphere. The third system contains the hydrosphere, or regions of Earth that are completely covered with water. The fourth system is the atmosphere, a gaseous envelope that maintains the planet's temperature while also supplying carbon dioxide for photosynthesis and oxygen for breathing. The cryosphere, which is composed of enormous amounts of ice in the poles and elsewhere, is the fifth system. The maintenance of the Earth as we know it depends on the interaction of all five of these vast and intricate systems.
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Which of the following best describes ribosomes?
A barrier which defines the boundaries of a cell
Genetic material which controls the functions of a cell
Tiny structures which make proteins from DNA
A jelly-like filling inside of a cell
Answer:
Tiny structures which make proteins from DNA
Explanation:
The main function of ribosome is protein synthesis
The vitreous humor is found in the _________.
A. Anterior chamber of the anterior segment
B. Posterior chamber of the anterior segment
C. Posterior segment
D. Optic canal
Answer:
b the posterior chamber of the eye
the components of every food chain are
Answer:
Explanation:
A food web consists of several components; primary producers, primary consumers, secondary consumers, tertiary consumers, and so on. Primary producers include green plants and are the foundation of the food web.
Answer:
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All living things have internal that helps them carry out basic functions.
true
................................
Answer:
True
Explanation:
By the end of grade 2. All organisms have external parts. Different animals use their body parts in different ways to see, hear, grasp objects, protect themselves, move from place to place, and seek, find, and take in food, water and air. Plants also have different parts (roots, stems, leaves, flowers, fruits) that help them survive, grow, and produce more plants.
By the end of grade 5. Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction. (Boundary: Stress at this grade level is on understanding the macroscale systems and their function, not microscopic processes.)
By the end of grade 8. All living things are made up of cells, which is the smallest unit that can be said to be alive. An organism may consist of one single cell (unicellular) or many different numbers and types of cells (multicellular). Unicellular organisms (microorganisms), like multicellular organisms, need food, water, a way to dispose of waste, and an environment in which they can live.
Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell. In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues or organs that are specialized for particular body functions. (Boundary: At this grade level, only a few major cell structures should be introduced.)
By the end of grade 12. Systems of specialized cells within organisms help them perform the essential functions of life, which involve chemical reactions that take place between different types of molecules, such as water, proteins, carbohydrates, lipids, and nucleic acids. All cells contain genetic information in the form of DNA molecules. Genes are regions in the DNA that contain the instructions that code for the formation of proteins, which carry out most of the work of cells.
Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level. Feedback mechanisms maintain a living system’s internal conditions within certain limits and mediate behaviors, allowing it to remain alive and functional even as external conditions change within some range. Outside that range (e.g., at a too high or too low external temperature, with too little food or water available), the organism cannot survive. Feedback mechanisms can encourage (through positive feedback) or discourage (negative feedback) what is going on inside the living system.
A central feature of life is that organisms grow, reproduce, and die. They have characteristic structures (anatomy and morphology), functions (molecular-scale processes to organism-level physiology), and behaviors (neurobiology and, for some animal species, psychology). Organisms and their parts are made of cells, which are the structural units of life and which themselves have molecular substructures that support their functioning. Organisms range in composition from a single cell (unicellular microorganisms) to multi-cellular organisms, in which different groups of large numbers of cells work together to form systems of tissues and organs (e.g., circulatory, respiratory, nervous, musculoskeletal), that are specialized for particular functions.
Special structures within cells are also responsible for specific cellular functions. The essential functions of a cell involve chemical reactions between many types of molecules, including water, proteins, carbohydrates, lipids, and nucleic acids. All cells contain genetic information, in the form of DNA. Genes are specific regions within the extremely large DNA molecules that form the chromosomes. Genes contain the instructions that code for the formation of molecules called proteins, which carry out most of the work of cells to perform the essential functions of life. That is, proteins provide structural components, serve as signaling devices, regulate cell activities, and determine the performance of cells through their enzymatic actions.
Which organelle is marked with x
I'm assuming there is supposed to be a picture to see, can you possibly show that? I can't help you unless I see the options and picture :)
Which clouds are best associated with a thunderstorm?
o towering funnel clouds
o swirling clouds with a calm center
o high cumulonimbus
1. A molecule that contains only carbon and hydrogen is called a
-
carbohydrate
carbonyl
hydrocarbon
hydroxyl
Answer:
hydrocarbon
Explanation:
It's called a hydrocarbon
Identify the 4 factors that cells vary by.
Answer:
Different types of cells have different shape-shifting capabilities, depending on the specific function of that cell in the organism. Three general factors determine cell shape: the state of the cytoskeleton, the amount of water that is pumped into a cell, and the state of the cell wall.
Explanation:
If any questions, put them below.
If you have no questions, please have a great rest of your day/night!
If a cell has 8 chromosomes, how many chromosomes will each of its daughter cells have after mitosis?
Answer:
From what I remember in my 9th grade biology class, it's usually half that amount.
Which of the following is a form of the
inclined plane?
A) pulley C) wheel and axle
B) screw D) lever
The answer is a or d.because it is
Scientists can determine the exact age of a fossil by how much carbon is left in the fossil. This is called
Question 9 options:
Both of these
None of these
Relative dating
Radiometric dating
Scientists can determine the exact age of a fossil by a technique called Radiometric dating. Radiocarbon dating involves the determination of how much carbon is left in the fossil.
In radiocarbon dating, it is possible to determine how much carbon is left in the fossil, by looking at its half-life period.
Radiocarbon dating (also known as carbon dating) refers to the technique aimed at determining the age of a fossil by exploring the properties of a radioactive carbon isotope called radiocarbon.
Radiocarbon or carbon-14 (14C) is a radioactive carbon isotope of carbon that contains 6 protons and 8 neutrons, whose amount in a sample can de be used to determine the age of a given organic material.
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how does cytokinesis happen in prokaryotes
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Like eukaryotes, cytokinesis is the last stage of separation for prokaryotes in a process called binary fission. ... During binary fission, a prokaryote begins by replicating its nucleiod (DNA) in the cell. Once this happens, the two nucleiods travel to the ends of the cell where there is cytokinesis
Which part would best model a cells nucleus
Answer:
which part of what
Explanation:
Which RNA types are involved in translation?
A. mRNA, tRNA, siRNA
B. siRNA, tRNA, rRNA
C.tRNA, rRNA, mRNA
D. rRNA, siRNA, tRNA
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What type of mutation changes a single DNA nucleotide base, and causes a change in a specific codon?
Answer:
A base substitution mutation is the answer.
Explanation:
A base substitution mutation changes only a single nucleotide within a gene sequence, so only one codon is affected.
I need help with this one
Why long cell easily go through the cell
Answer:
Cells divide for many reasons. For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. Cells also divide so living things can grow. ... Organisms grow because cells are dividing to produce more and more cells
Which feature forms at Earth’s surface from the cooling of lava?
extrusion
fault
intrusion
unconformity
Answer:
The correct answer is Extrusion.
Explanation:
I can confirm that it is 100% correct.
Answer: A
Explanation:
i took the test
what is the difference between plant cell nd animal cell
A plant cell contains a cell wall and chloroplasts, while animals cells do not have these cellular structures.
Chloroplasts are organelles required to produce energy in the form of ATP and thus synthesize simple carbohydrates (e.g., glucose) by the process of photosynthesis.Cell walls are cellular structures that help to support and shape plant cells.Moreover, plant cells generally contain big vacuoles, whereas animal cells generally exhibit small vacuoles.In conclusion, a plant cell contains a cell wall and chloroplasts, while animals cells do not have these cellular structures.
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the role of dna in cellular differentaation
Answer:
controls the way cells function, also determines what type of specialized cells will be made.
5. Jackson shares what he calls "his little depressing story" about coral reefs in Jamaica following a hurricane. He claims destruction such as that in Jamaica is only getting worse. Please elaborate on why it is getting worse, being sure to tie in natural weather catastrophes to your answer.
Answer:
In Jacksons talk about his depressing story he talks about how after a natural disaster such as a hurricane there is some kind of successional sequence of recovery but now what's happening is that overfishing, pollution, and climate change are all interacting In a way that prevents the recovery.
Explanation:
I had the same question in my marine science class and got it right.
Which organelle is the powerhouse of the cell
Answer:
The mitochondria
Explanation: Mitochondria (sing. Mitochondrion) are known as the powerhouse of the cell because they are responsible for the release of energy from food ,i.e, cellular respiration. This energy is released in the form of ATP (adenosine triphosphate), the energy currency of the cell.
In 2018, the average age for first marriage in the United States was 29.8 years for men and 27.8 years for women. These ages for first
marriages are
These ages for first marriages are Average age .
What is the average age of first marriage in the United States?The median age at first marriage for women was 28 years in 2015-2019, up from 26.3 in 2006-2010. The median age at first marriage for men was 29.9 years in 2015-2019, up from 28.1 in 2006-2010.
What is the median age at first marriage for women?In 2019, the median age for the first wedding among women stood at 28.4 years.
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A rainforest is an example of a
Answer:
tropical moist broadleaf forest
Answer:
It could be a rainforest biome, forest, or habitat
Explanation:
A little explanation or expanding could help for a more specific answer. Thank and rate plz.
Is it possible for social experience to make someone homosexual, or are homosexuals born with such a tendency? Then discuss how each of these theories has shaped public discourse and policy.
Answer:
actually that is by nature and by their hearts
Explanation:
the homosexuality is not a bad thing but the society is taking it as a wrong thing. the society is thinking that people who are homosexual are monster but they are wrong and who give them right to judge others sexuality everyone is born with their own nature but some people in the society doesn't understand this. I don't know if it can help you
what happens when fats are bieng oxidised
Answer:
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Fats are digested through conversion into free fatty acids, which are stored in a form known as triglycerides in the adipose tissue. ... In the mitochondria, the fatty acids are oxidized in the process that creates adenosine triphosphate (ATP), the energy-producing fuel.
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Briefly explain how DNA profiling is used to identify individuals.
And what parts of a river with sediments be able to settle