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Q.

Which of the following option includes correct examples each for animals with chitinous exoskeleton and those covered by a calcareous shell respectively?

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a

Locusta and octopus

b

Apis and slugs

c

Pheretima and Dentalium

d

Butterfly and Pinctada

answer is D.

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Detailed Solution

Butterfly (Arthropoda) has chitinous exoskeleton and Pinctada (Mollusca) has calcareous shell. Pheretima (Annelida) lacks chitinous exoskeleton.Slugs and octopus are shell less Molluscs.
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