Across
- 5. a behavior that has been learned from experience or observation
- 9. English naturalist. He studied the plants and animals of South America and the Pacific islands, and in his book On the Origin of Species by Means of Natural Selection (1859) set forth his theory of evolution.
- 10. Natural selection that favors individuals with either extreme of a trait; tends to eliminate intermediate phenotypes.
- 12. sum total of all the different forms of genetic information carried by all organisms living on Earth today
- 13. Similarities in genes, embryology, and homologous structures are all evidence that organisms share a common ancestor. All life is connected, just some more recently than others
- 15. form of reproductive isolation in which two populations develop differences in courtship rituals or other behaviors that prevent them from breeding
- 20. Natural selection in which individuals at one end of the phenotypic range survive or reproduce more successfully than do other individuals.
- 21. The ability of an individual to survive and reproduce in its specific environment
- 23. A common demand by two or more organisms upon a limited supply of a resource; for example, food, water, light, space, mates, nesting sites.
- 25. procedure that ensures every person in a population has an equal chance of being chosen to participate
- 26. Theory that states that natural disasters shaped Earth's landforms and caused extinction of some species.
- 27. Separation of two or more organisms of the same species living in the same area but in separate habitats, such as in the water and on land
- 28. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
Down
- 1. Pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change
- 2. The number of species within a specific habitat.
- 3. An organism that cannot make its own food and gets food by consuming other living things.
- 4. organisms are members of same species if they can mate & produce fertile offspring
- 6. Passing of genes from parent to offspring so those genes can continue to be passed from generation to generation
- 7. form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water
- 8. form of natural selection in which individuals near the center of a distribution curve have higher fitness than individuals at either end of the curve
- 11. The process by which humans breed other animals and plants for particular traits.
- 14. The process by which unrelated species become more similar as they adapt to the same kind of environment
- 16. A proposed explanation in evolutionary biology stating that new species arise from the result of slight modifications (mutations and resulting phenotypic changes) over many generations; the theory that evolution occurs slowly.
- 17. An organism that can make its own food
- 18. Separation of a species or population so that they no longer interbreed and evolve into two separate species
- 19. Reproduce with other members of the same species
- 22. Form of reproductive isolation in which two populations reproduce at different times
- 24. an inherited behavior that does not depend on the environment or experience