Which is the correct pair of complementary nitrogenous bases in DNA?

What best describes the dropping height of a ball that bounces back up to a height of 45 cm

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

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is