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Unformatted text preview: gemmules)-The movement of water thru sponge is key for feeding (intracellular), reproduction (sexually: internal fertilization eggs fertilized in body, zygote develops called larvae which are motile, asexually : thru budding, part of sponge breaks off and grows/ or it produce gemmules, which later become a new sponge ), circulation, excretion, response (no nervous systems, produce toxins)-Commensalism relationships w/ photo bacteria, algae, plant protists, which provide O2 and sponge provides shelter....
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- Fall '11