Biology, asked by aasthakumar04, 7 months ago

Name any four animal phyla which do not show the cellular level of organization and their fertilization is external.

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Answered by ItzStrawBerry

phylum Porifera

phylum PoriferaThe phylum Porifera ("pore-bearing") consists of approximately 5,000 species of sponges. These asymmetrical animals have sac-like bodies that lack tissues, and are usually interpreted as representing the cellular level of evolution.

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