Choose all the answers that apply. precipitation: a. occurs evenly all over the earth b. returns freshwater to the earth c. is the change from a liquid into a gas d. occurs when snow and ice change directly into water vapor e. falls mostly in the form of rain

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.