BIO 102- MODULE 4 EXAM QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Examine the food web for a particular terrestrial ecosystem in Figure 42.1.
Which pair of species acquire energy from more than one trophic level?
Answer: 3 and 5.
Which statement is true with regard to current human population growth?
Answer: Its rate of growth is slowing.
Which of the following is a likely explanation for why invasive species take
over communities into which they have been introduced?
Answer: Invasive species are not held in check by the predators and agents
of disease that have always been in place for native species.
If a meteor impact or volcanic eruption injected a lot of dust into the
atmosphere and reduced the sunlight reaching Earth's surface by 70% for one
year, which of the following marine communities most likely would be least
affected?
Answer: Deep-sea vent.
The Hubbard Brook watershed deforestation experiment yielded all of the
following results except:
Answer: Calcium levels remained high in the soil of deforested areas.
Predict the fate of a phosphorus atom after a non-native earthworm consumes
leaf litter in a forest.
, Answer: It becomes incorporated into the earthworm as an energy-storing
molecule.
What is a metapopulation?
Answer: Populations that are linked by immigration and emigration.
Which of the following is a correct statement about the MacArthur/Wilson Island
Equilibrium Model?
Small islands receive few new immigrant species.
The feeding relationships among the species in a community determine the
community's
trophic structure.
If the flow of energy in an arctic ecosystem goes through a simple food chain,
perhaps involving humans, moving from phytoplankton to zooplankton to fish to
seals to polar bears, then which of the following could be true?
The fish can potentially provide more food for humans than the seal meat can.
According to the small-population approach, what would be the best strategy for
saving a population from extirpation?
introducing individuals from other populations to increase genetic variation
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Examine the food web for a particular terrestrial ecosystem in Figure 42.1.
Which pair of species acquire energy from more than one trophic level?
Answer: 3 and 5.
Which statement is true with regard to current human population growth?
Answer: Its rate of growth is slowing.
Which of the following is a likely explanation for why invasive species take
over communities into which they have been introduced?
Answer: Invasive species are not held in check by the predators and agents
of disease that have always been in place for native species.
If a meteor impact or volcanic eruption injected a lot of dust into the
atmosphere and reduced the sunlight reaching Earth's surface by 70% for one
year, which of the following marine communities most likely would be least
affected?
Answer: Deep-sea vent.
The Hubbard Brook watershed deforestation experiment yielded all of the
following results except:
Answer: Calcium levels remained high in the soil of deforested areas.
Predict the fate of a phosphorus atom after a non-native earthworm consumes
leaf litter in a forest.
, Answer: It becomes incorporated into the earthworm as an energy-storing
molecule.
What is a metapopulation?
Answer: Populations that are linked by immigration and emigration.
Which of the following is a correct statement about the MacArthur/Wilson Island
Equilibrium Model?
Small islands receive few new immigrant species.
The feeding relationships among the species in a community determine the
community's
trophic structure.
If the flow of energy in an arctic ecosystem goes through a simple food chain,
perhaps involving humans, moving from phytoplankton to zooplankton to fish to
seals to polar bears, then which of the following could be true?
The fish can potentially provide more food for humans than the seal meat can.
According to the small-population approach, what would be the best strategy for
saving a population from extirpation?
introducing individuals from other populations to increase genetic variation
