Question
How are pisces different from tetrapoda?
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S.No.
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Pisces
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Tetrapoda
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1.
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They have exoskeleton of dermal scales
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They have an exoskeleton of epidermal scales, feathers or hair.
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2.
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They have two-chambered heart (1 auricle, 1 ventricle) in most cases.
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They have three or four chambered heart (2 auricles, 1 or 2 ventricles).
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3.
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Pisces breathe with gills.
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Breathe with lungs except some amphibians.
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4.
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They have internal ear only.
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They have external and middle ear, besides internal ear, in most cases.
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5.
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They are aquatic.
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They are terrestrial, some have secondarily became aquatic.
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6.
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The lateral line sense organs are well-developed.
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The lateral line sense organs are absent, except a few larval amphibians.
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7.
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They are poikilothermic.
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Some are poikilothermic and some are homeotherms.
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8.
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They have 10 pairs of cranial nerves.
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They have 10-12 pairs of cranial nerves
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