Amolecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 10 million years. how many years ago did two species share a common ancestor if the molecules found in these two species differ by a total of six mutations?
a. 6 million years
b. 10 million years
c. 30 million years
d. 60 million years

Answer;

D.60 million years

Explanation;

The two species shared a common ancestor 60 million years ago, if the molecules found in these two species differ by a total of six mutations.

Mutation is a sudden, random spontaneous change that occur in the genetic make up of an organism or a cell.

If one mutation occurred after 10 million years;

Then six mutations will need (6 ×10) 60 million years.

it is either c or d and i know for sure it is not a or b

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.