2.  The _________ factors that affect an organism include other living organisms or species in that organism’s community.  A. BioticC. Parasitism  B. AbioticD. Mutualism

3.  BIOTIC

4.  A bird fluffs its feathers to trap warm air close to its body. The temperature of the air next to the bird’s skin is an _________________factor.   A. BioticC. Parasitism  B. AbioticD. Predation

5. Abiotic

6.  The species interaction based on helping each other is called__________.   A. MutualismB. Commensalism  C. PredationD. Parasitism

7.  Mutualism

8. a.a. parasitism c.c. mutualism b.b. commensalismd.d. symbiosis Some birds are known as honey guides because they may be followed by humans to wild beehives. When the humans take honey from the hives, the birds are able to feast on the honey and bees, too. This type of relationship can best be described as ____.

9. mutualism

10. a.a. habitat c.c. niche b.b. communityd.d. none of these Cougars are predators that often eat weakened or diseased animals. This is a description of the ____ of cougars.

11. niche

12. a. community c. population b. ecosystem d. biosphere Figure 2-2 The group of animals in Figure 2-2 is an example of what?

13. population

14. a.mutualismc.parasitism bcommensalismd.predation flea Figure 2-4 The Flea shown in Figure 2-4 is involved in which type of symbiosis?

15. parasitism

16. a.continent where it livesc.plant species it eats b.locations where it shelters d.temperatures it experiences Which of the following information could be included in the description of a grasshopper ’ s niche, but not in a description of its habitat?

17. plant species it eats

18. Organisms with overlapping niches probably have which type of relationship? a.commensalc.mutualistic b.competitived.parasitic

19. competitive

20. The range of temperatures in which an insect is able to live and reproduce is one element of that organism’s ____________________, or the animals place or special position on the food chain. A. HabitatC. Niche B. BiosphereD. Atmosphere

21. Niche

22. Mosquito larvae are eaten by some fish species when they are present in the same body of water. For the mosquito these fish are a ____________________ factor. A. BioticC. Mutualism B. AbioticD. commensalism

23. Biotic

24. The relationship between nitrogen-fixing bacteria and their host plants if they both benefit mutually is best called ____________________. A. PredationC. Mutualism B. commensalismD. Parasitism

25. Mutualism

26. What is the difference between a habitat and a niche? A. A habitat is the environment while a niche is all things that requires the organism to survive. B. The habitat is what an organism eats and a niche is where an organism lives.

27. A habitat is the environment while a niche is all things that requires the organism to survive.