ANIMAL PHYSIOLOGY
EXCRETION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which do not have specific excretory organs? (Select 2 correct answers)
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Sponges
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Coelenterates Coelenterates
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Protozoans
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Birds
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Reptiles
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Explanation:
Detailed explanation-1: -The members of Coelenterata are aquatic, so they excrete the body waste directly through the body surface. As they belong to a lower phylum of the animal kingdom, they lack different organ systems like excretory, digestive, and others.
Detailed explanation-2: -Some invertebrates, notably echinoderms, cnidarians, and sponges, have no organs to which an excretory function can be confidently ascribed.
Detailed explanation-3: -Asterias (Star fish) belongs to phylum Echinodermata in which an excretory system is absent.
There is 1 question to complete.