Populations and Communities

5. the individual that is hunted as food
6. in this symbiosis, the host is not affected
9. the study of how living things interact with each other and their environment
10. something that prevents an organism from living or growing in an environment
12. the part of an ecosystem where an organism lives and feeds is called the organism's ___
13. in this symbiosis, the host is harmed
16. the two individuals in a symbiotic relationship are the host and the ___
17. an organism's particular role an ecosystem
18. when numbers of a population leave an area in search of better resources
19. the smallest unit of ecological organization is an ___
21. when an organism resembles another due to coloration or body characteristics
22. change in a species over time due to changes in the environment
23. populations will increase if the ___rate is higher than the __rate (two words)
25. the living and once living factors in an ecosystem
27. when a population increases because new individuals are coming into the habitat
28. the number of organisms per unit area (two words)

1. the largest population an environment can support is called this (two words)
2. this process is sometimes referred to as "survival of the fittest" (two words)
3. if the carrying capacity is exceeded in a population, the population will ___ in number
4. all the different populations living together make this
5. the individual that hunts another for food
7. a trait or behavior an organism has inherited that enables it to prosper in its environment
8. all members of one species living in a particular area
11. a community plus the nonliving factors
14. the struggle between organisms for survival in a habitat with limited resources
15. interaction where one organism kills another
20. in this symbiosis, both the host and symbiont benefit
24. a relationship between two individuals
26. the factors in an ecosystem that are nonliving