Each primary spermatocyte will eventually produce how many sperm cells

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.

Which of the following explains why a tree is often used as a model to represent the principle of common descent