Across
- 3. form of natural selection in which a single curve splits into two; occurs when individuals at the upper and lower ends of a distribution curve have higher fitness than individuals near the middle
- 6. form of reproductive isolation in which two populations reproduce at different times
- 8. occurs when natural selection favors one of the extreme variations of a trait
- 9. A characteristic that an organism can pass on to its offspring through its genes.
- 10. the process of selecting organisms with desired traits to be parents of the next generation
- 12. the formation of new and distinct species in the course of evolution.
- 15. genetic makeup of an organism
- 17. a reduction in the genetic diversity of a population caused by a drastic reduction in its size
- 21. deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as carrier of genetic information.
- 22. form of natural selection by which the center of the curve remains in its current position; occurs when individuals near the center of a distribution curve have higher fitness than individuals at either end
- 26. form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water
- 30. A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
- 32. Process by which unrelated organisms independently evolve similarities when adapting to similar environments
- 33. A preserved remnant or impression of an organism that lived in the past.
- 34. diagram showing evolutionary relationships of organisms with a common ancestor; resembles a tree
- 35. Producing maximum number of fertile offspring who survive to reproduce themselves (carrying genetic code into future generations)
- 36. displace another species by being more successful
Down
- 1. A group of similar organisms that can breed and produce fertile offspring.
- 2. A characteristic that improves an individual's ability to survive and reproduce in a particular environment.
- 4. Study of past and present distribution of organisms.
- 5. the two-part, scientifically recognized name given to an organism, consisting of its genus and species
- 7. a random error in a DNA sequence that can lead to a change in a trait
- 11. the influence of closely associated species on each other in their evolution.
- 13. British naturalist who developed a hypothesis of natural selection similar to Darwin's. considered the father of biogeography
- 14. similar structures that related species have inherited from a common ancestor
- 16. change in the genotypic ratio of a population, over generations
- 18. A change in the gene pool of a population due to chance
- 19. British natural scientist who formulated a theory of evolution by natural selection. considered to be the father of evolution
- 20. relating to genes or heredity
- 23. the ratio of the genotypes that appear in offspring
- 24. isolation between populations due to differences in courtship or mating behavior
- 25. how well an organism can survive and reproduce in its environment
- 27. Genetic drift that occurs when a few individuals become isolated from a larger population and form a new population whose gene pool composition is not reflective of that of the original population.
- 28. sequence of DNA that codes for a protein and thus determines a trait
- 29. nonfunctional or greatly reduced traits of an organism
- 31. group of individuals of the same species that live in the same area at the same time