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Q: The __era is also known as the 'age of mammals'.
  • A. Neozoic
  • B. Cenozoic
  • C. Palaeozoic
  • D. Mesozoic
Correct Answer: Option B - The cenozoic era is known as the 'age of mammals' beginning about 66 million year ago and extending to the present, known for the age of mammals because the extinction of many groups of giant mammals, allowing smaller species to thrive and diversify because their predators no longer existed. The cenozoic era is generally divided into three periods : The paleogene (66 million to 23 million year ago) Neogene (23 MYA to 2.6 MYA) and the Quaternary (2.6 MYA to the present).
B. The cenozoic era is known as the 'age of mammals' beginning about 66 million year ago and extending to the present, known for the age of mammals because the extinction of many groups of giant mammals, allowing smaller species to thrive and diversify because their predators no longer existed. The cenozoic era is generally divided into three periods : The paleogene (66 million to 23 million year ago) Neogene (23 MYA to 2.6 MYA) and the Quaternary (2.6 MYA to the present).

Explanations:

The cenozoic era is known as the 'age of mammals' beginning about 66 million year ago and extending to the present, known for the age of mammals because the extinction of many groups of giant mammals, allowing smaller species to thrive and diversify because their predators no longer existed. The cenozoic era is generally divided into three periods : The paleogene (66 million to 23 million year ago) Neogene (23 MYA to 2.6 MYA) and the Quaternary (2.6 MYA to the present).