Most of the neurons in the human brain are

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.

As a small change in a person's dna can cause a genetic disorder

Which is an example of a decomposer? a. bear b.algae c.grass d.bacteria d bacteria