decreased production of urine is by producing excessive amount of parathyroid hormone

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

About how much of the cell mass is watet

Vessels draining the myocardium of the heart, open primarily ,into which chamber?