Question: Do you thiink that the enviroment is important?

Sam Tazzyman answered on 21 Jun 2011:

Do you mean for evolution? It is very important, because it determines which organisms survive, and therefore which ones breed, and therefore which ones pass their genes on, and therefore what evolves. An example is the polar bear, which is white whereas other bears are brown. The ancestors of polar bears were presumably brown, but the lighter coloured ones found it easier to sneak up on their prey, and so they survived better because they got more food, and so they passed on their genes. At every generation the lighter bears did best until eventually we got white bears.