No,Rock haven't cells because rock is non living thing.
A, An ancestor of whales had legs. Hope i helped! :D
To solve this, you would need to identify the number of amino acids (20) you are dealing with and the number of positions (8) that are available in your polypeptide. so that would come out to 20 x 20 x 20 x 20 x 20 x 20 x 20 x 20 = 20^8
The fossil record is best at preserving visible changes in organisms through geologic time. This visible change is referred to as the evolutionary change.
<h3>The importance of fossil record</h3>
Fossils are the remains or impressions of a historical organisms which are preserved as a mold or in rocks due to pressure.
Fossil records are information made concerning these historical organisms about:
- the structure of the organisms,
- in what environment they lived, and
- the order in which they lived.
When these rocks are studied, visible changes in organisms through geologic time are observed which is that simple life forms gradually evolved into more complex ones.
Therefore, evolutionary change. is that visible changes noticed in fossil records.
Learn more about fossils here:
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It would decrease letter b is the awnser