During which stage is the placenta form plz i’ll give u the brain kissy answer

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

What will happen to a population of predators if there is a sudden, temporary increase in the number of prey? a. the population of predators will be uniform with no change. b. the population of predators will increase first and then decrease slowly. c. the population of predators will increase continuously.

Does masterbation affect height growth or loss of growth hormone?