What important discovery did researchers aboard the Alvin make?

Construct an explanation about the function of mitosis for multicellular organisms

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

What are the responsibilities of the region of the brain highlighted below? =+= will rate brainiest =+=