The first mammals arose:

  • A
    After the extinction of dinosaurs
  • B
    Before the origin of dinosaurs
  • C
    Along with the dinosaurs
  • D
    From the dinosaurs

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Birds and mammals in the geological development of the Earth arose in which period?

The origin of mammal-like reptiles occurred in which period?

The earliest reptiles evolved in which geological period?

Which of the following is considered the ancestor of the pteridophytes?

The $Cenozoic$ era is known as:

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