Question

which unit of geologic time began 65.5 million years ago and continues to the present?
cenozoic era
mesozoic era
permian period
precambrian time

Explanation:

The Cenozoic era began approximately 65.5 million years ago and continues to the present. It followed the Mesozoic era. The Permian period is part of the Paleozoic era and the Precambrian is an even earlier time - span.

Answer:

Cenozoic era