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.