Sponges eliminate carbon dioxide and cellular wastes by

Sponges eliminate carbon dioxide and cellular wastes by


a. allowing them to diffuse into the water that passes through the sponge.

b. excreting them into the surrounding water through pores in the body wall.

c. transporting them to an excretory organ that empties into the osculum. 

d. converting them into usable carbohydrates.


Answer: a



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