Animals which don't have notocord in their life cycle are called non-chordates and they include

Porifera to Echinodermata

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Porifera to Hemichordata

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Protozoa to Urochordata

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All animals excepts vertebrates

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Solution

The correct option is A Porifera to Echinodermata
Non-chordates are animals without a notochord – the rod-like elastic structure that supports the body. This phylum consists of a small group of worm-like, marine species with an organ-system level of organization. Members of Porifera, Arthropoda, Mollusca and Echinodermata fall under Non-chordates. So, the correct answer is option A.

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The animals that have a true vertebral column or a notochord are called ___.

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