What is a good animal testing essay thesis?

How does natural selection change thephenotypes within a population over time?

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

Where is the nictitating membrane found? a. between the eyelid and the eyeball b. between the retina and the optic nerve c. between the outer and middle ear d. in the organ of corti in the middle ear