The animal which has a gut with single opening is:
Correct answer: A. Planaria
- A. Planaria
- B. Cockroach
- C. Earthworm
- D. Roundworm
Explanation
The correct answer is Planaria. Planaria are flatworms with a digestive system that consists of a single opening, known as a gastrovascular cavity, serving both as an entry for food and an exit for waste. This is a characteristic of simpler, more primitive organisms.
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