Respuesta :

The first known bird fossil date to the mesozoic era of time.

Explanation:

  • The first known bird fossil is  Archaeopteryx.
  • Archaeopteryx were not exactly like modern birds and are called dinosaur like birds..
  • Carbon dating suggest that these birds evolved during the jurassic period of mesozoic era.
  • These are considered as the only birds of that era.
  • Ancestors of modern birds began to evolve during cretaceous period  and kept on evolving through Cenozoic era.

Answer:

Jurassic

Explanation:

I took the test for pf

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