Answer: Which unit of geologic time is the shortest and most recent?
Holocene epoch.
When did modern humans evolve on earth?
C. About 6 mya
Explanation: Which unit of geologic time is the shortest and most recent?
Longest to shortest; eons, eras, periods, epochs and ages. The Holocene epoch is still going.
When did modern humans evolve on earth?
Humans first came to earth during the Cenozoic Era, which was approximately 6 million years ago.