How much sperm makes a women pregnant?

What field of science did harry hess study?

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

What is the statement plant growth is affected by the color light