Natural Selection
Across
- 3. the number of individuals with each trait in a population
- 4. living things, such as plants, animals, and bacteria
- 5. a characteristic that all members of a species have
- 8. something in the environment that affects an individual's chances of surviving
- 9. a group of the same type of organism living in the same area
- 11. a specific characteristic of an individual organism
- 12. a long piece of DNA that contains many genes
- 16. the process by which the distribution of traits in a population changes over many generation
- 17. a group of organisms of the same kind that do not reproduce with organisms from any other group
- 18. an y difference in traits between individual organisms
- 19. an organism produced as a result of reproduction
- 20. a related organism from a pervious generation
- 21. an instruction for making a protein molecule
Down
- 1. a trait that makes it less likely that an individual will survive in a specific environment
- 2. a random change to a gene that sometimes results in a new trait
- 6. everything(living and nonliving) that surrounds an organism
- 7. to receive genes from a parent
- 10. a trait that makes it more likely that an individual will survive
- 13. a type of large molecule that performs important functions inside an organism
- 14. a group of individuals born and living at about the same time
- 15. a type of molecule that genes and chromosomes are made of