Unit 7, Topic 2

Question 1

environmental factor that causes one phenotype to be better than another

Answer 1

selective pressures

Question 2

heritable trait or behavior in an organism that aids in its survival and reproduction in its present environment

Answer 2

adaptation

Question 3

observable traits expressed by an organism

Answer 3

phenotype

Question 4

underlying genetic makeup, consisting of both physically visible and non-expressed alleles, of an organism

Answer 4

genotype

Question 5

Can an organism’s physical environment influence evolutionary change? Why or why not?

Answer 5

Changing environmental conditions influence which organisms survive and reproduce, which, in turn, can lead to evolutionary changes in populations.

Question 6

Organisms of the same species with different genotypes will always have different phenotypes. Do you agree with this statement? Why or why not?

Answer 6

different genotypes can lead to the same phenotype. This happens because genes have different alleles.

Question 7

Examples of selective pressures

Answer 7

predation, competition, disease