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Free CLEP Science and Mathematics Exam Braindumps (page: 28)

Page 27 of 128
PDF with 494 Questions

The following diagram shows a food web within a temperate deciduous forest of the Northeastern United States.



The maples, oaks, and walnut trees would be considered

  1. primary producers
  2. secondary producers
  3. primary consumers
  4. decomposers
  5. detritus

Answer(s): A

Explanation:

Green plants are the primary producers in all terrestrial ecosystems. There are no secondary producers. Producers make their own food via photosynthesis.



The following diagram shows a food web within a temperate deciduous forest of the Northeastern United States.



The top-level consumers in the ecosystem shown are the

  1. bacteria and fungi
  2. hawks
  3. spiders
  4. king snakes
  5. caterpillars

Answer(s): B

Explanation:

The hawks are the lop-level consumer, judging by the diagram that shows that hawks have no predators and feed off of smaller organisms than themselves.



The following diagram shows a food web within a temperate deciduous forest of the Northeastern United States.



An increase in the population of rodent-eating birds would result most immediately in a(n)

  1. increase in the bluebird population
  2. decrease in the hawk population
  3. increase in the spider population
  4. crash of the entire food web
  5. increase in the bacteria and fungi populations

Answer(s): C

Explanation:

Most immediately, an increase in the population of rodent-eating birds would mean fewer rodents, who are the sole predator of spiders, according to this food web diagram. Thus, although the hawk population may fall eventually due to fewer rodents and therefore fewer snakes), the immediate effect would be on the spiders.



The following diagram shows a food web within a temperate deciduous forest of the Northeastern United States.



Bacteria and fungi are considered decomposers because they

  1. are autotrophic
  2. are heterotrophic
  3. are at the bottom of the food web
  4. cat the remains of dead organisms
  5. are mainly microscopic

Answer(s): D

Explanation:

Decomposers are organisms that feed off of the remains of dead plants, animals, and other organisms. They are an essential part of any ecosystem as they recycle the nutrients of dead organisms back into the soil for new life to use.






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