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6 October, 11:53

During which period did mammals first appear?

a.

Pleistocene

b.

Carboniferous

c.

Cretaceous

d.

Jurassic

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Answers (2)
  1. 6 October, 11:57
    0
    Mammals first appeared during Jurassic period.
  2. 6 October, 12:18
    0
    Answer to your question is D. Jurassic
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