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.