1. Evolution theorya) Evolution is the fundamental organizing principle of biology and the main theme.b) Dawins theory of natural selection is just theory but not fact, the fact is something that have evidence to be proved, we can say that organisms evolved from previously living forms because scientists have found lots of organism fossils. 注：理论是由一些现象推到而出的，并非有人亲眼所见，是看不见摸不着的，由此而称为理论，而事实是真实存在的，或者曾经真实存在并且留下证据而可以供人考究的现象。我的理解是人们通过对于一些事实的总结和归纳，而得出一些可以解释这些现象或者事实的原因性说明，是为理论。事实是理论的基础，理论是事
