Across
- 3. the role that a species plays in an ecosystem
- 6. the variety of processes such as energy flow and matter cycling that occur within ecosystems
- 7. those that are introduced to an ecosystem in which they have not occurred previously
- 9. states that "biodiversity ensures ecosystems against decline in their functioning because many species provide greater guarantees of functioning even it others fail."
- 12. preserved remains or traces of prehistoric organisms
- 13. is the variety of life on Earth
- 14. any inheritable trait that gives an individual some advantage over other individuals in a given population
- 16. refers to variety in the genetic makeup of individuals in a population
- 18. is the process by which species generally change over time
- 19. has a broad niche
- 20. an organism that plays a unique role in the way an ecosystem functions
Down
- 1. is a permanent change in the DNA sequence within a gene in any cell inherited
- 2. the variety of genes found in a population or in a species
- 4. those that naturally originated in a given ecosystem and have become suited to the environmental conditions
- 5. refers to Earth's diversity of biological communities such as deserts, grasslands, forests, lakes, rivers, and wetlands.
- 8. process by which individuals with certain traits are more likely to survive and reproduce under a specific set of environmental conditions, thereby passing these traits on to their offspring
- 10. occupies a narrow niche
- 11. is the place, or type of ecosystem, in which a species lives and obtains what it needs to survive
- 15. ecosystems that can be represented within a larger geographic region
- 17. species whose presence or absence indicates the quality or characteristics of certain environmental conditions