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Question
Sponges have a cell aggregate body plan with pores all over their body. To which phylum do they belong?
Sponges have a cell aggregate body plan with pores all over their body. To which phylum do they belong?
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Solution
The correct option is A Porifera
Sponges are members of the phylum Porifera. They are multicellular organisms with a cellular level of body organisation (cell aggregate body plan) and have pores all over their body with channels allowing water to circulate through them.
Coelenterates have a hollow body cavity. Although they have a gastrovascular cavity it is not a true body cavity.
Platyhelminthes are soft, thin-bodied, leaf or ribbon-like worms.
Nematodes have pseudocoeloms because they do not have a full-fledged body cavity.
Porifera
Sponges are members of the phylum Porifera. They are multicellular organisms with a cellular level of body organisation (cell aggregate body plan) and have pores all over their body with channels allowing water to circulate through them.
Coelenterates have a hollow body cavity. Although they have a gastrovascular cavity it is not a true body cavity.
Platyhelminthes are soft, thin-bodied, leaf or ribbon-like worms.
Nematodes have pseudocoeloms because they do not have a full-fledged body cavity.
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