ecosystem qz

Name: 



 

 

 

 

 

 

 

Ecosystem Interactions


 

True/False
Indicate whether the sentence or statement is true or false.
 

1. 

Freshwater habitats are independent of terrestrial habitats.
 

2. 

An ecosystem consists of biotic and abiotic factors.
 

3. 

Clearing a forest would reduce the amount of energy available to the consumers.
 

4. 

While an understanding of the interactions between organisms and their environment was very important to early hunter and gatherer humans, it is even more important today because humans are having significant effects on the environment.
 

5. 

Cutting down trees in a forest alters the habitat of the organisms living in the forest.
 

6. 

An organism’s niche includes its habitat.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

7. 

Abiotic factors affect an ecosystem by all of these except the
a.
quantity and quality of water
c.
nitrogen-fixing bacteria
b.
amount of light available
d.
quantity of minerals
 

8. 

The most important single factor affecting the biosphere is
a.
solar radiation
c.
precipitation
b.
the biotic community
d.
wind
 

9. 

Which of the following is the smallest ecological unit?
a.
a community
c.
a population
b.
a biome
d.
an ecosystem
 

10. 

Collectively, physical factors such as light, temperature, and moisture that affect an organism’s life and survival are called the
a.
biotic environment
c.
ecosystem
b.
abiotic environment
d.
niche
 

11. 

The rate of photosynthesis carried on by plants living in a body of water depends upon the
a.
oxygen content of the water
c.
amount of light that penetrates the water
b.
nitrogen content of the water
d.
elevation of the body of water
 

12. 

Which of the following would not be included in a description of an organism’s niche?
a.
its trophic level
c.
its color
b.
the humidity it prefers
d.
when it reproduces
 

13. 

Ecology is the study of the interaction of living organisms
a.
with each other and their habitat.
b.
and their communities.
c.
with each other and their physical environment.
d.
and the food they eat.
 

14. 

The destruction of the ozone layer may be responsible for an increase in
a.
cataracts.
c.
cancer of the retina.
b.
melanoma.
d.
All of the above
 

15. 

Ozone in the atmosphere
a.
leads to formation of acid precipitation.
b.
combines readily with water vapor.
c.
absorbs harmful radiation from the sun.
d.
All of the above
 

16. 

Ecological models are useful for
a.
making predictions about future ecological changes.
b.
testing predictions about future ecological changes.
c.
evaluating proposed solutions to environmental problems.
d.
All of the above
 

17. 

The physical location of an ecosystem in which a given species lives is called a
a.
habitat.
c.
community.
b.
tropical level.
d.
food zone.
 

18. 

Which of the following is not an adaptation for avoiding unfavorable conditions?
a.
acclimation
c.
dormancy
b.
body temperature regulation
d.
migration
 

19. 

Which of the following would not be included in a description of an organism’s niche?
a.
its trophic level
b.
the humidity and temperature it prefers
c.
its number of chromosomes
d.
when it reproduces
 


 
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