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Question
Answer in detail.
You are asked to classify an animal in the correct group. The animal has a soft body and arm-like tentacles. You dissect the animal and find that it has an internal shell. Is the animal a cnidarian or a mollusc? Explain your answer.
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Solution
The animal is a mollusc because although both molluscs and cnidarians have soft bodies and tentacles only molluscs have shells (internal or external) and cnidarians don’t.
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