Jayden has been asked to wear a protective vest while his dentist takes an x-ray. why is this? a) x-rays are dangerous mutagens. b) x-rays are considered poisonous. c) x-rays are harmful chemicals. d) x-rays are a result of uv radiation.

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.

What causes temperature extremes in the desert

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere