First slide
Classification of Animals
Question

The development of which of the following animals includes a larval stage that is morphologically distinct from the adult?

Easy
Solution

Development in sponges (e.g., Euspongia) is indirect and includes a larval stage that is morphologically distinct from the adult. Development in Pheretima (earthworm), Palamnaeus (scorpion) and Labeo (rohu) is direct.

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