Explanation:
The "fossil record" refers to the placement of fossils throughout the surface layers of the Earth. Older fossils are buried more deeply than younger ones. Scientists use the placement of fossils as a guide for determining when life forms existed, and how they evolved.
Answer:
They are called alleles.
Explanation:
Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits.
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It’s the first choice because the C at the end does not pair with anything, it was an extra pair that was made
Usually enzyme inhibitors slow down the enzymes activity, so in this case, I would put D.
