Natural Selection

5. Father of modern evolution
8. The population reduces and genetic drift occurs because of the ... effect
9. A trait that assists in fitness of an organism
10. Creation of a new species
11. Evolution over a long timespan that results in the creation of a new species
13. Behavior inherited from birth
15. Survival of the fittest
16. A trait that is shared between two species, inherited from a shared ancestor, is called...
19. Naturalist that came up with the idea that traits were altered during the organism's life
20. ... Advantage, when ... individuals have increased success in reproduction
21. An organism that focuses on a long lifespan and raising its children

1. A group of organisms, of one species, in a given area
2. An organism that focuses on high reproduction rates
3. Trait that is no longer used by the organism
4. Source of new adaptations and traits
6. A graph that shows evolutionary relationships
7. Barriers that prevent hybrid zygotes from reproducing after birth
12. Principle that allele frequencies will remain constant, unless outside factors cause a change
14. Trait in two unrelated species that perform the same function
17. Barriers that prevent hybrid zygotes before birth
18. All genes of a population
19. Behavior that is learned during the organism's life