Evolution

2. Refers to the variety of species in an environment.
3. Refers to the average time it takes for a species to reach reproductive maturity.
8. Organisms can produce fertile offspring.
11. The process by which the remains or traces of organisms are preserved in rock.
12. Someone who studies life's history through fossils.
13. Types of fossils which show links between species.
14. The sterile offspring of two animals from two different species.
16. An organism from which another organism has evolved or descended from.
18. The fossil _____ documents the history of life and is key evidence for evolution.
20. The process by which an organism changes to better suit its environment.
21. Refers to the process by which nutrients move through the environment.

1. Studies how and why different plants and animals exist in certain locations.
4. Refers to a type of biological selection where humans are choosing traits instead of nature.
5. limits interactions between groups within a species, leading to unique traits in a population and potentially the development of new species.
6. A type of organ which has lost its primary ancestral function.
7. Animals within a species that share similar features.
9. Natural Selection is guided by these principles.
10. A type of dating process which involves measuring the rate of decay of nearby unstable elements.
15. The development of new species.
17. Fossils can only form in the absence of elements which cause _________
19. A type of evolution where two organisms share a common ancestor.