1. Habitat - where an organism lives
Niche - resources for life activities
Fundamental niche includes all possibilities,
Realized niche is the way things actually are.
Descriptions will vary.
2. Space, shelter and resources.
3. Niches are different.
4. Answers may vary but should include points discussed on pages 838 and 840.
5 a-d. Definitions in text
6. Scramble competition - individuals compete directly for limited resource. Contest competition - individuals compete indirectly for resources by competing for social dominance or possession of territory.
7. J-shaped curve (Figure 41.4) - number of individuals grows exponentially. S-shaped curve (Figure 41.8) - growth slows and levels off at carrying capacity.
8. Basic answer: Growth rate for sheep is too fast for resources. They run out of food and have no natural predators. Growth rate for deer is much slower. They have high infant mortality and they don't run out of food.
9. In K-selection, density-dependent factors maintain population close to carrying capacity. In r-selection, density-independent factors predominate.
10. If predators completely decimated the prey, they could die out for lack of food (assuming they did not have an alternate food source).
11. Answers will vary but should include a definition of each.
12. Those people are still having children and living longer.
TO THINK ABOUT
1. Answers may vary but generally this will mean an increase in the poorer segments of society. Other economic and social variables will enter in.
2. Answers will vary.
3. Answers will vary.
4. Answers will vary.
5. Pakistan. Younger people will still have children.
6. Answers will vary.
7. Answers will vary but should include such leveling off methods as more wide-spread and effective means of birth control.
8. Answers will vary.
feedback form |
permissions |
international |
locate your campus rep |
request a review copy
Copyright ©2001 The McGraw-Hill Companies.
digital solutions |
publish with us |
customer service |
mhhe home
Any use is subject to the
Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of the
The McGraw-Hill Companies.