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Question

Which of the following organisms have exoskeleton?

A
Nereis
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B
Pheretima
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C
Leech
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D
Housefly
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Solution

The correct option is D Housefly
Nereis, Pheretima (earthworm) and leech are annelids. House fly is an arthropod. Annelids are devoid of exoskeleton. But exoskeleton is a characteristic feature of arthropods. The skeleton outside their body or exoskeleton is made up of chitin which is a type of carbohydrate. It is impermeable to water and protects the insect from desiccation or drying up.

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