Not all organism are equipped the same for

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

How do the sperm cells get from the stigma to the ovules?

Science which of the following is an example of a cyclic behavior that is seasonal? i think the answer is d, i just need to double check : ). a. running from predators. b. searching for water. c. hunting at night. d. migrating for warmth. ***