Biology, asked by abhishek2781, 10 months ago

In which phylum of animalia organ system level of organisations appear first??

Answers

Answered by dartaha2120

Answer:

phylum Annelida

These segments are present in at least some organs with serial repetitions. It is first observed in phylum Annelida. Notochord is a rod like structure that is formed on the dorsal side in some animals.

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