Multiple choice

In which one of the following geological periods did the first bird appear?

  1. Permian

  2. Triassic

  3. Jurassic

  4. Cretaceous
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The first known bird, Archaeopteryx, appeared during the Jurassic period (approximately 150 million years ago). This transitional fossil shows both reptilian and avian characteristics, providing evidence for the evolution of birds from theropod dinosaurs. The Permian and Triassic periods predate birds, while the Cretaceous period saw further bird diversification.

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