NATURAL SELECTION

3. A specific characteristics of an individual organism.
4. When a huge number of species on Earth die out completely around the same time.
6. The number of individuals with each trait in a population.
9. A trait that makes it more likely that an individual will survive in a specific environment.
11. The preserved remains of plants and animals whose bodies were buried in sediments.
13. A trait that makes it less likely that an individual will survive in a specific environment.
14. An instruction for making a protein molecule.
15. A long piece of DNA that contains many genes.

1. Of a species, family, or other group of animals or plants having no living members; no longer in existence.
2. A random change to a gene that sometimes results in a new trait.
5. An organism produced as a result of reproduction.
7. To stay alive.
8. The process in which two parents pass on their genes to create offspring's.
10. A related organism from a previous generation.
12. A type of molecule that genes and chromosomes are made of.