Across
- 4. A variety of different types of organisms/species
- 6. An explanation based on extensive observation and reasoning that states that organisms change and develop over time to adapt and increase their rate of survival
- 7. The surroundings or conditions in which a person, animal, or plant lives or operates.
- 8. A term that describes a species that no longer exists.
Down
- 1. A trait that helps an organism survive and reproduce
- 2. The process by which populations of organisms with variations that help them survive in their environments live longer, compete better, and reproduce more than those that do not have the variations
- 3. Slight differences in the appearance of individual members of a species that arise naturally in populations caused by random changes in genes.
- 5. The struggle between organisms to survive in a habitat with limited resources