Question

A sponge is a colony of cells that show a slight degree of specialization within the colony with some of the cells developing flagella to assist with filtering food out of the water for the rest of the colony. How does this justify placing them in the animal kingdom rather than with the other colonial protists?
Answer
All the colonial protists are plantlike algaes, so having flagellated cells puts sponges with animals.
All of the cells in a sponge have nuclei, which makes them more like animals than like protists.
Colonial protists generally lack specialized cells, so sponges fit sli

Answer 1

All the colonial protists are plantlike algaes, so having flagellated cells puts sponges with animals.
All of the cells in a sponge have nuclei, which makes them more like animals than like protists.
Colonial protists generally lack specialized cells, so sponges fit slightly better with the animals.
Filter feeding is a common practice among marine invertebrates, so sponges belong with animals.

Answer 2

@rahulchatterjee helpp....

Answer 3

thats what i need!

Answer 4

Protists are single celled organisms. When they live in colonies, some of the protists specialise a little in *function* but never in structure. By contrast, in sponges individual cells have become specialised for their particular roles in structure too - the info given tells you that they have flagella but there are some smaller differences too.

That should make it a lot clearer why most scientist think that sponges are proper animals instead of colonial protists or metazoans.