Unit 4 Bio Vocab

3. Features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature
6. The physical separation of populations of organisms from one another due to geographical barrier
9. The basic unit of heredity passed from parent to child
12. Organisms best adjusted to their environment are the most successful in surviving and reproducing
15. The process of living organisms change over time
16. When a group within a species separates from other members of its species and develops its own unique characteristics
17. an evolutionary process in which humans consciously select for or against particular features in organisms
18. A measure of an individual's reproductive success
19. The physical separation of populations of organisms from one another due to geographical barriers
20. Similar physical features in organisms that share a common ancestor, but the features serve completely different functions
21. A physical incompatibility between reproductive organs of two organisms

1. Any change in the DNA sequence of a cell
2. A feature that a species inherited from an ancestor but that is now less elaborate and functional than in the ancestor
4. The dying out of a species
5. The preserved remains of plants and animals
7. A reproductive barrier which prevents interbreeding between distinct but closely related species due to differences in the timing of mating receptivity, activity, or fertility
8. The process of adapting
10. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success
11. The change in frequency of an existing gene variant in the population due to random chance
13. The process in which two or more populations of an ancestral species accumulate independent genetic mutations through time
14. Individuals mate in their preferred habitat, and therefore do not meet individuals of other species with different ecological preferences