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Which one of the following statements is incorrect?

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Countercurrent flow of blood and water in in gills of fishes enhances oxygenation.

Most of the aquatic arthropods use special vascularized structures called gills for respiration.

Larvae of amphibians perform branchial respiration.

Arthropods use their cuticle for exchange of oxygen and carbon dioxide with the atmosphere.

answer is D.

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Detailed Solution

In aquatic arthropods, respiratory organs are gills and book gills whereas in terrestrial arthopods, book lungs and tracheae are the respiratory organs.

Chitinous cuticle acts as exoskeleton in arthopods.

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