Cut away the free-hanging portion of the mantle to expose the gills. Does the clam have a respiratory organ

b. heterotroph

explanation:

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.

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

you know they are heterozygous for a trait because they have it as jj or jj.