Natural Selection
Across
- 3. an animal that hunts and kills other animals for food
- 6. the number of individuals with each trait in a population
- 8. a group of individuals born and living at about the same time
- 10. to stay alive
- 11. an event or process that leads to a result or change
- 14. any difference in traits between individual organisms
- 15. a long piece of DNA that contains many genes
- 16. a trait that makes it more likely that an individual will survive in a specific environment
- 19. an organism produced as a result of reproduction
- 20. a specific form of a gene that provides instructions for making a particular protein molecule
- 21. a way of hiding by looking the same as the background
- 23. a graph that uses bars to show how characteristics or values are distributed within a group
- 26. something in the environment that affects an individual’s chances of surviving sexualreproduction the process in which two parents pass on their genes to create offspring
- 28. a group of the same type of organism living in the same area
- 30. having died out completely and no longer alive anywhere on Earth
- 32. everything (living and nonliving) that surrounds an organism
- 33. things people do that affect the Earth system
- 34. living things, such as plants, animals, and bacteria
Down
- 1. the process by which the distribution of traits in a population changes over many generations
- 2. a trait that makes it less likely that an individual will survive in a specific environment
- 4. a result or change that happens because of an event or process
- 5. from any other group
- 7. a type of large molecule that performs important functions inside organisms
- 9. a characteristic that all members of a species have
- 12. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
- 13. a specific characteristic of an individual organism
- 17. a related organism from a previous generation
- 18. a group of organisms of the same kind (in one or more populations)that do not reproduce with
- 22. when a huge number of species on Earth die out completely around the same time
- 24. a random change to a gene that sometimes results in a new trait
- 25. a type of molecule that genes and chromosomes are made of
- 27. to receive genes from a parent
- 28. an animal that is hunted or killed by another animal for food
- 29. an instruction for making a protein molecule
- 31. a young insect that looks somewhat different from the adult