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Earthworms are

1. uricotelic when plenty of water is available
2. uricotelic under conditions of water scarcity
3. ammonotelic when plenty of water is available
4. ureotelic when plenty of water is available

Correct answer: ammonotelic when plenty of water is available

Solution

Earthworms live in moist environments and can excrete nitrogen mainly as ammonia when water is plentiful. Ammonia is highly toxic but requires lots of water to remove safely, so it fits conditions with abundant water.

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