Across
- 4. Describes the relative numbers of organisms of eacha ge within a population
- 5. A group of individuals that interbreed and produce fertile offspring
- 9. Members of a species that live in the same area at the same time
- 12. How organisms are arranged within an area
- 13. Parts of an ecosystem that are living or used to be living
- 14. The specific environment in which an organism lives
- 15. All living things and their physical environments
- 16. All of the populations in a particular area
Down
- 1. All parts of the earth that host life
- 2. Study of how organisms interact with each other and with their environments
- 3. Visual tool scientists use to show the age structure of populations
- 6. The number of individual organisms in an area
- 7. Proportion of males to females
- 8. Number of individuals within a population
- 10. Parts of an ecosystem that have never been living
- 11. Anything an organism needs