What is the answer??

Which process must a cell undergo top identical cells at the end of cell division

Identify the missing parts of the carbon cycle

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.