Natural Selection
Across
- 5. Physical attributes which improve a species ability to live and reproduce. Examples include: hawk's talons, shark's broad tail, toad's long-sticky tongue, clam's hard shell, etc.
- 9. the role an organism plays in its ecosystem.
- 11. structures that have a common function and suggest common ancestry
- 13. the genetic makeup of an organism
- 14. An adaptation in which an animal looks like an object or another animal.
- 15. Organisms have different genes and traits.
- 17. Being slightly different from another of the same kind.
- 18. An animal's color or pattern that helps an animal blend in with its surroundings
- 19. scientists who study fossils
- 21. Movement of animals from one area to another due to changes in seasons or environment.
- 22. preserved remains of animals, plants, and other organisms from the distant past
- 23. The purpose for which something is designed or exists
Down
- 1. to receive traits or characteristics that are passed down from a parent
- 2. the physical characteristics of an organism
- 3. A trait that allows a species to be better suited to its environment.
- 4. Structures that have lost their use through evolution
- 6. A process that favors the survival and reproduction of organisms with traits well adapted to their environment
- 7. the DNA sequences of all the genes of an organism
- 8. the complete set of genes and alleles within a population
- 10. The actions or activities which improve a species ability to survive and reproduce. Examples include: a trout's ability to extract oxygen from water, skunk's ability to spray disgusting defensive chemicals, bee's ability to transform nectar into honey, etc.
- 12. A group of organisms that is able to reproduce with each other.
- 16. How the body (plant or animal) is physically put together
- 19. A group organisms of the same species living in a particular area at the same time
- 20. behaviors that do not require learning