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kipiarov [429]
3 years ago
10

As the heart beats, blood flows through the body. A heart beats starts when a small group of specialized muscle cells

Biology
1 answer:
LiRa [457]3 years ago
7 0
The answer is c the right atrium
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3 years ago
A mutation that involves a single nucleotide is called.
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Point mutations are a broad category of mutations that describe a change in a single nucleotide of DNA, such as a substitution for another nucleotide, deletion of a nucleotide, or insertion of a single nucleotide into the DNA, resulting in DNA that differs from the normal or wild type gene...

or you can say:

Point mutations are a large category of mutations that describe a change in single nucleotide of DNA, such that that nucleotide is switched for another nucleotide, or that nucleotide is deleted, or a single nucleotide is inserted into the DNA that causes that DNA to be different from the normal or wild type gene ...

8 0
2 years ago
I'll give u a branliest if correct... nd don't just take the points
Marat540 [252]

Answer:

A

Explanation:

its the one that makes more sense to me

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