Evolution

2. differences in physical traits of an individual from the group to which it belongs
4. genetic drift that occurs after a small number of individuals colonize a new area
5. isolation between populations due to barriers related to time, such as differences in mating periods or differences in mating periods or differences in the time of day that individuals are most active
6. principle that states that the change in landforms result from slow changes over a long period of time
7. theory that states the geologic processes that shape Earth are uniform through time
9. all of the individuals of a species that live in the same area
11. process by which humans modify a species by breeding it for certain traits
13. theory that states that natural disasters such as floods and volcanic eruptions shaped Earth’s landforms and caused extinction of some species
16. group of organisms so similar to one another that they can breed and produce fertile offspring
18. evolution of two or more species from one ancestral species
19. collection of alleles found in all of the individuals of a population
20. genetic drift that results from an event that drastically reduces the size of a population

1. elimination of a species from Earth
3. body part that is similar in structure on different organisms but performs different functions
8. mechanism by which individuals that have inherited beneficial adaptations produce more offspring on average than do other individuals
10. body part that is similar in function as a body part of another organism but structurally different
12. change in allele frequencies due to chance alone, occurring most commonly in small populations
14. inherited trait that is selected for over time because it allows organisms to better survive in their environment
15. trace of an organism from the past
17. change in species over time