What happens to orbital velocity of earth as it gets closer to the sun

What is the number of phosphates in an atp molecule

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

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