How many molecules are in 3.4 x 1024 moles of A2B4?

Explanation for basic character?

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

Enzymes affect the reactions in living cells by changing the