Natural Selection

3. a group of animals, plants or other living things that all share common characteristics and that are all classified as alike in some manner.
4. no longer in existence.
5. the process where organisms that are best suited to their environment survive and pass on their genetic traits in increasing number to successive generations.
7. the action or process of forcing a body of igneous rock between or through existing formations, without reaching the surface.
9. a special skill which helps an animal to survive and do everything it needs to do.
10. a mistake or a change in a living thing's DNA
12. an English scientist who studied nature. He is known for his theory of evolution by natural selection.
13. any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.

1. a fossil that is useful for dating and correlating the strata in which it is found.
2. the theory that all the kinds of living things that exist today developed from earlier types.
6. the intentional breeding of plants or animals.
8. (of a rock formation) be broken by a fault or faults.
11. the act or process of changing parts of something.