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

Page 28 of 127

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


Why would a crash in the caterpillar population not affect the spider population very much?

  1. Spiders feed on the rodents and do not depend on the caterpillars
  2. The spiders are not an essential part of the food web
  3. The spiders could get nourishment by feeding off of the aphids
  4. The spiders can leave the ecosystem and move to another one
  5. Spiders can last for long periods of time without food

Answer(s): C

Explanation:

Organisms cannot simply pick up and move when adversity hits. Therefore, a food web with many branches and interconnections is best for all organisms, since fluctuations in one population would not crash the whole food web. The spiders, in this case, can depend on the aphids for food.



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


A temperate deciduous forest is characterized by

  1. having all four seasons ­ fall, winter, summer, and spring
  2. long, dark, winters and short, hot, rainy summers
  3. frequent fires during long, dry summers
  4. permafrost all year around
  5. pine trees and alpine vegetation

Answer(s): A

Explanation:

Deciduous forests are the leafy forests of the Northern United States, characterized by lots of maple, beech, elm, and other deciduous trees. All four seasons take turns throughout the year and leaves fall to the ground during the autumn.



An animal cell is placed in a solution containing a solute concentration greater than that of the cell's cytoplasm. The cell membrane is permeable to water but not to the solutes. What is likely to happen to the cell?

  1. The cell will swell due to active transport of water.
  2. The cell will shrivel due to active transport of water.
  3. The cell will shrivel due to osmosis.
  4. The cell will swell due to osmosis.
  5. No change will occur in the size of the cell.

Answer(s): C

Explanation:

If the cell is not permeable to the solutes, only water can move freely back and forth. A higher solute concentration out-side

the cell will pull water from the cell cytoplasm out and cause the cell to shrivel up.



An animal cell is placed in a solution containing a solute concentration greater than that of the cell's cytoplasm. The cell membrane is permeable to water but not to the solutes. What is likely to happen to the cell?

  1. The cell will swell due to active transport of water.
  2. The cell will shrivel due to active transport of water.
  3. The cell will shrivel due to osmosis.
  4. The cell will swell due to osmosis.
  5. No change will occur in the size of the cell.

Answer(s): C

Explanation:

If the cell is not permeable to the solutes, only water can move freely back and forth. A higher solute concentration out-side the cell will pull water from the cell cytoplasm out and cause the cell to shrivel up.



Page 28 of 127



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