The role of mass extinction in evolution. At the most basic level, mass extinctions reduce diversity by killing off specific lineages, and with them, any descendant species they might have given rise to. ... But mass extinction can also play a creative role in evolution, stimulating the growth of other branches.
I think it is catabolism though I am not sure.
Cell membrane presses against cell wall, but the cell wall is what gives the cell shape
Like Geography, climate, times and environment system