<span>(4) active transport
</span>Active transport is the movement of molecules across a cell membrane in the direction against their concentration gradient, i.e. moving from an area of lower concentration to an area of higher concentration.
Melting ice caps and glaciers
It affect The survival and extinction of species
It occurs when groups in a species become reproductively isolated and diverge. In allopathic specification, groups from an ancestral population evolve into separate species due to a period of geographical separation.
