Biochemist p. a. levene analyzed the components of the dna molecule and concluded the nucleotide was not the fundamental unit of nucleic acid polymer?
true or false

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

im not intirely sure but i think the anwser is d relative humidity