Biology, 02.09.2019 16:50 gabby640

By pumping water over their gills, fish and aquatic mollusks?
a. keep their gill membranes moist
b. maintain their body temperature
c. keep themselves moving through the water
d. promote diffusion of oxygen and carbon dioxide

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By pumping water over their gills, fish and aquatic mollusks?
a. keep their gill membranes mo...

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