Changes in genetic makeup of population

Question 1

Natural Selection

Answer 1

the process whereby organisms better adapted to their environment tend to survive and produce more offspring.

Question 2

Deme

Answer 2

a subdivision of a population consisting of closely related plants, animals, or people, typically breeding mainly within the group.

Question 3

Geographical Barrier and what it ultimately leads to

Answer 3

The separation of two populations of the same species or breeding group by a physical barrier, such as a mountain or body of water. Geographical isolation may ultimately lead to the populations becoming separate species by adaptive radiation.

Question 4

Gene Flow + What happens for this to be accomplished

Answer 4

Gene flow is the exchange of genes between two separate populations. This is most often accomplished when animals or spores from plants migrate to a new area. Any time a gene is introduced into a population where that gene once did not exist, gene flow has occurred.