1.Pick the odd one out from each of the groups given below on the basis of respiratory organs. Give reason for your answer. (a) Cockroach, grasshopper, snail, ant (b) Lizard, cow, earthworm, snake (c) Crocodile, whale, dolphin, fish (d) Snake, tadpole, crow, goat Answer: (a) Snail, as it does not breathe by means of trachea. (b) Earthworm, because it breathes through its skin and it does not have lungs. (c) Fish, as most fish breathe through their gills and do not have lungs. (d) Tadpole, as it breathes through gills and do not have lungs.
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a) Snail, as it does not breathe by means of trachea. (b) Earthworm, because it breathes through its skin and it does not have lungs. (c) Fish, as most fish breathe through their gills and do not have lungs. (d) Tadpole, as it breathes through gills and do not have lungs.
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