Unit 4 Bio Vocab

3. The process in which two or more populations of an ancestral species accumulate independent genetic mutations through time
4. A physical incompatibility between reproductive organs of two organisms
5. Similar physical features in organisms that share a common ancestor, but the features serve completely different functions
9. Organisms best adjusted to their environment are the most successful in surviving and reproducing
10. The process of living organisms change over time
12. A measure of an individual's reproductive success
16. The physical separation of populations of organisms from one another due to geographical barriers
19. Any change in the DNA sequence of a cell
20. When a group within a species separates from other members of its species and develops its own unique characteristics
21. The physical separation of populations of organisms from one another due to geographical barrier

1. Individuals mate in their preferred habitat, and therefore do not meet individuals of other species with different ecological preferences
2. The process of adapting
6. an evolutionary process in which humans consciously select for or against particular features in organisms
7. The preserved remains of plants and animals
8. The change in frequency of an existing gene variant in the population due to random chance
11. A feature that a species inherited from an ancestor but that is now less elaborate and functional than in the ancestor
13. A reproductive barrier which prevents interbreeding between distinct but closely related species due to differences in the timing of mating receptivity, activity, or fertility
14. The dying out of a species
15. Features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature
17. The basic unit of heredity passed from parent to child
18. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success