The heart valve at the entrance to the aorta is the valve. bicuspid mitral
aortic semimitral
pulmonary semilunar
aortic semilunar
tricuspid

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.

After a group of researchers conducts a new experiment that has never been conducted before, what is the best way for other scientists to make sure that the data is real

The hypothesis that evolution occurs at an irregular rate through geologic time is known as: directional evolution directional equilibrium punctuated equilibrium punctuated evolution