Across
- 2. The maximum population size that can be sustained by the available resources in a given environment.
- 4. The type of symbiosis in which one partner, the parasite, derives benefit from the other, the host.
- 7. Natural selection that acts against individuals with extreme expression of a trait.
- 10. When changes in the abundance of an organism result in changes at other trophic levels of the food chain.
- 12. Population growth that is constrained by biotic or abiotic factors such as competition or nutrients.
- 13. A living component of an environment.
- 15. The interaction that results when a resource is in short supply and one organism uses the resource at the expense of another.
- 16. The elimination of one species by another as a result of competition.
- 17. The type of symbiosis in which both partners benefit from the relationship.
- 18. The process in which one species evolves in response to another.
- 19. The full range of ecological characteristics of a species, like its feeding habits, specific habitat, and reproductive strategy.
- 20. The genetic adaptation of a population to its environment through evolution.
- 21. The entry of young individuals into a population or, in fisheries biology, into a fished stock.
Down
- 1. Unrestricted population growth where the population grows at a faster rate with each successive generation.
- 3. Natural selection that favors extreme expression of a trait.
- 5. A non-living (physical or chemical) component of the environment.
- 6. The study of the interactions between organisms and their environment.
- 8. Defense mechanisms that an organism uses only in response to predators.
- 9. The type of symbiosis in which one species obtains shelter, food, or other benefits without affecting the other, or host.
- 11. An essential factor whose short supply limits the growth of a population.
- 14. The sharing of resources by specialization.