Across
- 4. of the fittest The individuals with the best adaptations to the environment will survive and reproduce more than those individuals with low fitness in an environment.
- 7. A difference between individuals of the same species.
- 9. Darwin’s theory explains how modern organisms evolved over millions of years. Refer to the attached reading for more information.
- 10. A group of similar organisms that can mate with each other and produce fertile offspring.
- 11. When no members of a species are still alive.
- 12. A technique used to determine which of two fossils is older based on the layer of rock in which it was found.
- 13. The set of information that controls a trait; a segment of DNA on a chromosome that codes for a specific trait.
- 14. How well an organism can survive and reproduce in its environment.
Down
- 1. The theory that evolution occurs slowly but steadily.
- 2. A well-tested concept that explains a wide range of observations.
- 3. The process of selecting a few organism with desired traits to serve as parents of the next generation.
- 5. Change in the genetic material of a cell. The raw material for evolution.
- 6. The preserved remains or traces of an organism that lived in the past.
- 8. A trait or novel process that helps an organism survive and reproduce.
- 15. The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species.