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Which of the following does not have blood but undergoes respiration...

This question belongs to General Knowledge Biology
Biology
?

Which of the following does not have blood but undergoes respiration?

Answer & Solution
Correct Answer: Option C
Cockroach has blood known as homocoel, snails and kangaroos also have blood in their bodies. But hydra does not contain any blood but still it respires. It does not have any respiratory organs but it respires and thus exchanges gases throughout its body.
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