Which statement describes a benefit of coral reefs? A. The supply food to organisms in both rivers and ponds.
B. They produce chemicals that remove pollution from oceans.
C. They are home to many species of fish and marine invertebrates.
D. They trap sunlight to help plants grow in the deepest parts of the ocean.

this protocol describes a detailed procedure for intracellular flow cytometry staining.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

you can't see the options

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