SECTION
WATER QUALITY
16.3
Section Quiz
Choose the letter of the best answer.
1. How can fertilizers used on lawns and fields affect a lake?
a. They can stimulate excess plant and algae growth.
b. They can increase the amount of oxygen in the water.
c. They can prevent biomagnification.
d. They can alter the level of the water in the lake.
2. Deformities in an aquatic indicator species can reveal the
a. effect of pollutants on the species’ predators.
b. biodiversity of the species in the area.
c. quality of the water in which it lives.
d. rate of reproduction of the species.
3. Pollutants that are fat-soluble
a. are excreted in an organism’s waste.
b. accumulate in an organism’s body.
c. do not pass to the next generation.
4. What happens during biomagnification?
a. Scientists use microscopes to look at pollutants.
b. Pollutants increase in concentration as they move up the food chain.
c. Water-soluble pollutants become more concentrated.
d. Animals in the food chain become larger.
5. Which of the following organisms is likely to be most affected by biomagnification
of a pollutant?
a. phytoplankton
b. zooplankton
c. fish
CHAPTER 16
Human Impact on Ecosystems
Copyright by McDougal Littell, a division of Houghton Mifflin Company
d. can be detoxified in water.
d. hawk
Assessment Book
McDougal Littell Biology
Section Quiz
315