Which one of the following statement about the given animals is correct?

Roundworms are pseudocoelomates

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Bivalve are acoelomates

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Spiders are pseudocoelomates

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Flatworms (Platyhelminthes) are coelomates

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Solution

The correct option is A Roundworms are pseudocoelomates
Acoelomates are animals without a body cavity. Examples include Poriferans, Coelenterates, Ctenophora, Platyhelminthes, and Nemathelminths. In pseudocoelomates, body space is pseudo coelom or false coelom, like roundworm. In coelomates, body space is a true coelom. Bivalve, a mollusc and spider, belonging to Phylum Arthropoda are coelomates while flatworms are acoelomates.

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Similar questions

Which of the following statements are incorrect about Phylum Platyhelminthes?

Assertion [A] : Platyhelminthes are acoelomates.

Reason [R] : In platyhelminthes the coelom is filled with a packing tissue called mesenchyme.

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