Unit 5: Natural Selection

2. any difference in traits between individual organisms
4. a type of molecule that genes and chromosomes are made of
5. an animal that is hunted or killed by another animal for food
6. a type of large molecule that performs important functions inside organisms
8. a random change to a gene that sometimes results in a new trait
11. a related organism from a previous generation
12. a trait that makes it more likely that an individual will survive in a specific environment
13. a graph that uses bars to show how characteristics or values are distributed within a group
15. a specific characteristic of an individual organism
17. a group of individuals born and living at about the same time
18. to receive genes from a parent
19. a specific form of a gene that provides instructions for making a particular protein molecule
22. a characteristic that all members of a species have

1. the process by which the distribution of traits in a population changes over many generations
3. a long piece of DNA that contains many genes
4. the number of individuals with each trait in a population
7. everything (living and nonliving) that surrounds an organism
9. an organism produced as a result of reproduction
10. a way of hiding by looking the same as the background
14. an instruction for making a protein molecule
16. an animal that hunts and kills other animals for food
20. a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group
21. a result or change that happens because of an event or process