Evolution

5. a type of speciation caused by an unplanned geographic barrier.
9. the development of similar structures in closely related species.
10. a type of speciation involving two parallel subpopulations.
13. a type of speciation involving a new species evolving inside an existing population.
15. a change in a DNA sequence.
16. the variety of life.
17. the process of a single species diverging into two or more descendant species.
19. a physical or physiological difference between individuals of the same species.
20. the basic physical and functional unit of heredity.

1. a variant form of a gene.
2. one of the five kingdoms. Humans are apart of it.
3. a diagram used to show the evolutionary history of organisms.
4. the evolution of different species from a common ancestral species.
6. a type of speciation caused by a geographic barrier.
7. the rivalry between organisms based around resources.
8. the name of one of the scientists who proposed natural selection.
11. the study of the evolutionary history of a group of organisms based on their similarities and differences.
12. the independent development of similar structures in unrelated organisms.
14. a mutation that increases the chances of survival.
18. the 'father of taxonomy'.