Which one of these is not an example of inter-cellular communication? a. chemical signal from putituary gland to adrenal gland b. a vesicle closes over a nutrient c. chemical messengers dock onto receptors pf adrenal gland d. cortisol increases blood pressure

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.

With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite

What are two examples of conduction that we use everyday