Populations and Communities

4. in this symbiosis, both the host and symbiont benefit
11. a trait or behavior an organism has inherited that enables it to prosper in its environment
12. the factors in an ecosystem that are nonliving
15. a relationship between two individuals
16. the study of how living things interact with each other and their environment
18. interaction where one organism kills another
20. when a population increases because new individuals are coming into the habitat
21. the largest population an environment can support is called this (two words)
22. all members of one species living in a particular area
24. the individual that is hunted as food
25. change in a species over time due to changes in the environment
26. the two individuals in a symbiotic relationship are the host and the ___
27. the individual that hunts another for food
28. an organism's particular role an ecosystem

1. all the different populations living together make this
2. this process is sometimes referred to as "survival of the fittest" (two words)
3. the living and once living factors in an ecosystem
5. populations will increase if the ___rate is higher than the __rate (two words)
6. in this symbiosis, the host is not affected
7. the number of organisms per unit area (two words)
8. the part of an ecosystem where an organism lives and feeds is called the organism's ___
9. in this symbiosis, the host is harmed
10. a community plus the nonliving factors
13. something that prevents an organism from living or growing in an environment
14. the struggle between organisms for survival in a habitat with limited resources
17. if the carrying capacity is exceeded in a population, the population will ___ in number
19. when an organism resembles another due to coloration or body characteristics
23. the smallest unit of ecological organization is an ___
25. when numbers of a population leave an area in search of better resources