During times of sexual arousal, the sperm leave their storage area and travel into long tubes called the
erectile tissue
seminal vesicles
vas deferens
fallopian tubes

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 two main phases of a cell cycle

All eukaryotic cells contain small bodies called