Which of the following are roles that ions play in living things? Maintaining an acid/base balance in an organism

maintain the balance of water in cells

regulate what substances cross cell membranes

help regulate your heartbeat

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

In which layer do organisms on earth love?

Why are current extinctions of concern to enviromentalists?