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  4. In which phylum larva/young one is bilaterally symmetrical but adult one is radially symmetrical?

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Q. In which phylum larva/young one is bilaterally symmetrical but adult one is radially symmetrical?

Delhi UMET/DPMTDelhi UMET/DPMT 2004

Solution:

In the members of phylum Echinodermata, symmetry is bilateral in larva and pentamerous radial in adults e.g.. Starfish. The members of phylum Porifera are asymmetrical or with radial symmetry. Most of Arthropods show bilateral symmetry. Molluscs also have bilateral symmetry.