Write four points of differences between the phyla Porifera and C… - Vidyadip

Question

Write four points of differences between the phyla Porifera and Ctenephora. Give an example of each.

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Answer

	Porifera	Ctenophora
1.	Animals show cellular level of organisation.	Animals show tissue level of organisation.
2.	They are asymmetrical.	They are radially symmetrical.
3.	Ciliated comb plates are absent.	Ciliated comb plates are present.
4.	Water canal system is well-developed.	Water canal system is absent.
5.	Water canal system is well-developed.	A skeleton is absent.
6.	Asexual reproduction occurs by fragmentation or gemmules while sexual reproduction takes place by cross-fertilisation e.g., Spongilla.	No asexual reproduction is seen; only sexual reproduction occurs e.g., Pleurobrachia.

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