mphan1358 mphan1358 20-12-2022 Biology Answered Which unit of geologic time is gthe shortest and most recent? - cenozoic era -holocence epoch -quanternary period -hadean epoch when did modern humans evolve on Earth? a. About 10,000 years ago b. About 3. 2 mya c. A bout 6 mya d. About 4. 5 bya URGET PLEASE HELP!!!!