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Replication of RNA genome in RNA virus does not involve proofreading. Thus RNA viruses have higher rates of mutation. So the correct option is B.
<h3>What is meant by proofreading? </h3><h3> </h3>
There are a variety of mechanisms in the cell to prevent mutations. Thus, permanent changes in the DNA sequence are prevented.
During the process of synthesis of DNA, DNA polymerases can analyse any mistake made during the synthesis and fix it. The majority of mispaired bases can be fixed by this process. It is called proofreading.
This process is not present in RNA and RNA polymerases. Thus RNA viruses appear to have higher rates of mutation compared to DNA viruses.
Therefore the correct option is B.
Read more about RNA viruses, here
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Answer:
Epinephrine binds to receptors on some smooth muscles (ex: around arterioles) → Ca++ released from ER → intracellular Ca++ up → stimulates contraction. c. Epinephrine binds to receptors on some smooth muscles (ex: around bronchioles) → phosphorylates protein needed for response to Ca++, preventing response.
Answer:
A
Explanation:
i am doing work for natural selection in my bio class rn, so this is pretty recent:
Natural selection is saying that there are different variants of a species and the ones with the more useful traits will be more likely to survive. whether color, size, shape. Pretty much who is better adapted to the environment
The image below helped me understand this a lot more
The only one that does not relate to this is A, since overbreeding does not really have to do with adapting
I really hope this helps u!
pls give a brainliest and a thx ;)
Varieties a number or collection or any of various groups of animals ranking below a species
Breeds a group of animals for reproduction by means of sexual process