Natural Selection

1. the study of the size, shape, and structure of animals, plants, and microorganisms and of the relationships of their constituent parts.
4. the person who created the theory of evolution through natural selection
6. If the alleles of a gene are different, one allele will be expressed;
7. the scientific study of functions and mechanisms in a living system.
10. animals that are killed and eaten by other animals
11. Some traits make an organism more likely to survive and reproduce in its environment.
12. an interaction between organisms or species in which both require a resource that is in limited supply
15. any environmental or physical pressure that elicits a response from an organism.
16. the process by which the information encoded in a gene is turned into a function
18. a successive stage in natural descent of organisms:
19. changes in the heritable traits of a population of organisms as successive generations replace one another
20. The basic unit of heredity passed from parent to child.

2. The effect of the other allele, is masked.
3. a characteristic or trait that can be passed from a parent to a child through the genes.
5. process in which an organism adapts to its environment through selectively reproducing changes in its genotype.
8. the formation of new and distinct species in the course of evolution.
9. an organism's ability to pass its genetic material to its offspring.
13. a biological interaction where one organism, the predator, kills and eats another organism
14. Multiplying or increasing in number.
17. the changing of the structure of a gene, resulting in a variant form