Which animal do not possess larval stage in its life cycle?

Ascaris

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Frog

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Taenia

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Pheretema

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Solution

The correct option is D Pheretema
Earthworms belong to an Annelida which reproduces sexually. Cocoon contains many fertilised eggs but only one embryo completes development, while other ova serve as nurse cells. The development is direct without a free larval stage. After the development of 2-3 weeks, the young worm crawls out of the cocoon. So, the correct answer is option D.

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