The female gamete or reproductive cell

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

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems