Frog respires through lungs but toad respires through skin
Frog has a tail but toad has no tail
Frog has no parotid glands but toad has a pair of parotid glands
A
Frog has no exoskeleton but toad had scales
B
Frog has a tail but toad has no tail
C
Frog has no parotid glands but toad has a pair of parotid glands
D
Frog respires through lungs but toad respires through skin
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Solution
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Frogs do not have exoskeleton as they are vertebrates but toads do not have scales either. Both frogs and toads respire using lungs and skin. Frogs do not have tail. Parotid glands are poisonous glands present on the head of toads.
Hence option D is the correct answer.
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