abiotic factors {Ans: nonliving parts of an ecosystem}environment {Ans: everything (living/biotic and nonliving/abiotic) that surrounds an organism}natural selection {Ans: the process by which the distribution of traits in a population changes over many generations}effect {Ans: a result or consequence of the cause}generation {Ans: a group of individuals born and living at about the same time}protein molecule {Ans: a type of large molecule that performs important functions inside organisms}