I'm doing a review sheet and i can't describe how molecules are different than atoms.

how to describe how molecules are different than atoms?

i'd appreciate it if someone would answer my question.

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this