natural selection

3. a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
6. the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution
8. the action or process of mutating
9. a defense or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings
11. to change or develop slowly often into a better, more complex, or more advanced state : to develop by a process of evolution Some believe that birds evolved from dinosaurs.
12. a change or difference in condition, amount, or level, typically with certain limits.

1. the action or process of adapting or being adapted
2. a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
4. The theory of evolution is a shortened form of the term “theory of evolution by natural selection,” which was proposed by Charles Darwin
5. was an English naturalist, geologist and biologist, best known for his contributions to the science of evolution.
7. was a French naturalist.
10. of a quality, characteristic, or predisposition) derived genetically from one's parents or ancestors