The stage where no division occurs during oogenesis is??

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of

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