What gas do some scientist think was missing from earths early atmosphere

What valuable hardwood is rapidly being cut in the tropical rain forests of malaysia, the philippines, indonesia, and indochina?

Chemosynthesis is: the process of breaking down sugars to get energy the process of making organic food molecules in the absence of light the internal biochemistry used by organisms to make ATP the transfer of chemicals against or opposite the

Distingquish between codon and anit codon

Why do scientists consider vestigial structures evidence for evolution?

Eating a diet high in protein for an extended period of time would be hardest on which of the following organs? The pancreas and gallbladder since they must produce the enzymes needed to break down the protein.

In pea plants, smooth pea shape is dominant to wrinkled pea shape. If a pea plant that is true-breeding for smooth pea shape is crossed with a pea plant that is true-breeding for wrinkled pea shape, what will be true of the offspring?

Are atoms completely lost or gain in a chemical re

Epinephrine and norepinephrine that are released from the adrenal glands affect target tissue for a longer period of time than the same substances released from neurons at their peripheral receptors. why?

Interpret this phrase: "we respire because our cells respire"

What are the two reasons for the change in the population of the giraffes?