Chapter 4 Population Ecology

4. characteristics of the environment that limit population growth.
6. includes all parts of Earth that host life, with all of its organisms and environments.
7. the study of how organisms interact with each other and with their environment.
8. a group of individuals that interbreed and produce fertile offsprings.
9. the specific environment in which an organism lives.
10. parts of an ecosystem that have never been living.
13. describes how organisms are arranged within an area.
14. a seasonal movement into and out of an area.
15. when a population increased by a fixed percentage each year.
17. proportion of males to females.
20. shows how the likelihood of death varies with age, population ecologists use graphs.
22. members of a species that live in the same area at the same time make up a population.

1. includes all of the living things and their physical environments within a particular area.
2. describes the number of individuals within a population per unit area.
3. the largest population size a given environment can sustainably support.
5. describes the relative numbers of organisms of each age within a population.
11. describes the number of individual organisms present in a given population at a given time.
12. parts of an ecosystem that are living or used to be living.
16. describes how a population's initial exponential increase is slowed and finally stopped by limiting factors.
18. the departure of individuals from a given area.
19. all of the populations in a particular area.
21. the arrival of individuals from outside a given area.