What is the role of hemoglobin in the body?

Depending on the organism the number of in a cell may change

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

Which layer will become saturated first when rain falls?