Some organisms have a cell aggregate body plan with numerous pores all over their body. To which phylum do they belong to?
A
Nematoda
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B
Platyhelminthes
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C
Coelenterata
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D
Porifera
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Solution
The correct option is D Porifera Organisms like sponges are multi-cellular organisms with a cellular level of body organisation (cell aggregate body) and bear pores all over their body with channels allowing water to circulate through them. They belong to the phylum Porifera.