Answer:
The Pleistocene Epoch is typically defined as the time period that began about 2.6 million years ago and lasted until about 11,700 years ago. The most recent Ice Age occurred then, as glaciers covered huge parts of the planet Earth.
This is an example of facilitated diffusion.
Facilitated diffusion is the process of impulsive passive transport of molecules, it is the transfer of substances across a biological membrane from an area of higher concentration to lower concentration by means of carrier molecule.
