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A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is :
(a)Petromyzon
(b)Eptatretus
(c)Myxine
(d)Neomyxine

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Important Questions on Animal Kingdom
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Which of the following characteristic features always holds true for the corresponding group of animals?

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Which one of the following characteristics is not shared by birds and mammals?

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Choose the correct statement.

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An important characteristic that Hemichordates share with Chordates is:

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Which among these is the correct combination of aquatic mammals ?

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Which one of the following characters is not typical of the class Mammalia?

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Which is the National Aquatic Animal of India?

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The gestation period of elephant is about:
