Excretory Products And Their Elimination Ques 10
10. Earthworms are
[2006]
(a) uricotelic when plenty of water is available
(b) uricotelic under conditons of water scarcity
(c) ammonotelic when plenty of water is available
(d) ureotelic when plenty of water is available
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Answer : c
Hints & Solutions
(c) Some animals have dual behaviour of excretion eg. earthworm. It excretes ammonia (hence called ammonotelic) when enough water is available but excretes urea (ureotelic) in dry conditions.
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