Females are choosier about a mate's traits than are males. This difference is explained in terms of the:

What is responsible for nearly all cases of color vision deficiency?

a. Cloudiness of the cornea b. An impairment in the brain area responsible for color vision c. A deficiency of rods d. The absence of one type of cone

Why did the ancient Egyptians develop techniques for embalming and mummification?

A. To prevent the corpses from smelling bad B. In order for the person's soul to move to the next life, the body had to remain in tact C. In order to improve the chances for reincarnation as a high status animal  D. So the body could be exhibited as a work of art