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Question
Animals devoid of mouth and anus among the following is:
Animals devoid of mouth and anus among the following is:
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Solution
The correct option is A Porifera
- Members of Porifera do not have a digestive system. Hence they don't have a mouth and anus. The functions of the digestive system are performed by the canal system.
- Coelenterates have a mouth and anus as they have a gastrovascular cavity.
- Platyhelminthes have an incomplete digestive tract but mouth and anus are present.
- Nematodes are pseudocoelomates and show the presence of a complete digestive system with a distinct mouth and anus.
So, the correct answer is option A.
- Members of Porifera do not have a digestive system. Hence they don't have a mouth and anus. The functions of the digestive system are performed by the canal system.
- Coelenterates have a mouth and anus as they have a gastrovascular cavity.
- Platyhelminthes have an incomplete digestive tract but mouth and anus are present.
- Nematodes are pseudocoelomates and show the presence of a complete digestive system with a distinct mouth and anus.
So, the correct answer is option A.
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