Excretion and Gas Exchange in Sponges are Accomplished By

Question

Excretion and gas exchange in sponges are accomplished by
A)active transport.
B)diffusion.
C)contractile vacuoles.
D)nephridia.
E)osmosis.

Accepted Answer

Sponges lack specialized organs for excretion and gas exchange. Instead, these functions occur via simple diffusion across the sponge's body surface, as the body wall is thin and permeable.