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PLLLLLLLLLLLZ HELP Which of the following is marked by the appearance of organisms with hard parts?
Question 8 options:

the beginning of the Cenozoic

the end of the Precambrian

the end of the Mesozoic

the beginning of the Cretaceous

Respuesta :

Answer:

the beginning of the Cenozoic

Explanation:

  • The Cenozoic period began with the 65 million years ago and continuous till today and is composed of the modern-day inhabitants and is also known as the age of mammals and these were as the hornless rhinos and flight less dinosaurs.