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 started about 65.5 million years ago and continues to the present. The Mesozoic era ended around 65.5 million years ago. The Permian period ended long before that, around 252 million years ago. The Precambrian time predates the Paleozoic era and ended about 541 million years ago.

Answer:

Cenozoic era