Biology CH 5-1 & CH 5-2 Limits on Population Growth Under

Biology CH 5-1 & CH 5-2 Limits on Population Growth
1. Under conditions of logistic growth, population size will rise & fall around an
average point called the _____________________________.
2. One of the best known mechanisms of population control is the
_______________________ relationship.
3. ____________________ can limit the size of populations by weakening their
hosts, causing disease or death.
4. Human activities, such as damming rivers, are density-____________________
limiting factors.
5. Density-___________________ limiting factors affect all populations, whether
the population size is two or a hundred.
6. List the main characteristics of a population.
7. Give an example of population density….remember what it is…and remember
that it can be put into mathematical terms. *Also, be able to recognize examples
of population density.
8. What does the range of a population tell you that density does not.
9. The movement of organisms into a given area from another area is called
10. When organisms move out of the population, this is known as
11. Using the terms birth rate and death rate, give descriptions of what occurs to a
population as it grows (this is application!);
12. Using the terms birthrate, death rate, immigration & emigration, list ways that a
population can decrease in size. (**this is application!).
13. When individuals in a population reproduce at a constant rate, it is called
___________________ growth.
14. The various growth phases through which MOST populations go through are
represented on a(an) _______________________ growth curve.
15. In a __________________________ growth curve, exponential growth is the
phase in which the population ___________________ quickly and few animals
are dying.
16. When the exponential phase of a logistic growth curve of a population ceases, the
population growth begins to __________________________.
17. If the population grows larger than the carrying capacity of the environment, the
______________may rise.
18. Define density dependent limiting factor and list several examples.
19. Define density-independent limiting factor and list several examples.
You will have 22 questions on your test. This test covers sections 1 & 2 of chapter 5;
Please be sure to have a No. 2 pencil with you the day of the test.