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Poriferians are more primitive than cnidarians, …

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Poriferians are more primitive than cnidarians, mention some characteristics of it to justify

Posted by Yuvraj Singh 6 years, 10 months ago

CBSE > Class 11 > Biology

1 answers

Roopam Das 6 years, 10 months ago

Porifera are more primitive because the do not have germ layer, nervous system and specialized cells for defense. They were evolved in 600 MYA. Cindarians are modern than porifera as they evolved in 580 MYA. They have germ layers and nervous system and specialized cells for defense and self protection.

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