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Review Quiz #3 (2016)
More Ecology
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Population Graph
Question 1
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Use the graph above to calculate the mean rate of population growth (individuals per day) between day 3 and day 5. Give your answer to the nearest whole number.
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Energy Flow
Question 2
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What percent of the biomass in the forest community represented above is tied up in the shrub layer? Give your answer to the nearest whole number.
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Predator/ ORey
Question 3
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Use the graph above to calculate the lag time in months between the change in the densities of the prey and the predator populations. Give your answer to the nearest tenth of a month.
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Succession
Question 4
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The diagram above shows the progression of ecological events after a fire in a particular ecosystem. Based on the diagram, which of the following best explains why the oak trees are later replaced by other trees?
(A) Eventually the other trees grow taller than the oak trees and form a dense canopy that shades the understory.
(B) Oak trees alter the pH of the soil, making the forest better suited for shrubs and other trees.
(C) Roots of shrubs proliferate in the soil of the forest and prevent the oak trees from obtaining water.
(D) Oak trees succumb to environmental pollutants more readily than do either the shrubs or the other trees.
Question 5
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The area covered by tropical rain forest is reduced by millions of hectares per year due to agriculture and logging. Which of the following best describes a likely result of tropical rain forest deforestation?
(A) Populations of plants and animals will decrease as more rain forest disappears, leading to a decrease in biodiversity.
(B) An increase of soil moisture will lead to a rapid increase in new vegetation coverage.
(C) An increase in atmospheric carbon dioxide will lead to higher levels of ultraviolet radiation reaching the surface of Earth.
(D) More oxygen will be available to other organisms as plant numbers decrease.
Question 6
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Thrips are insects that feed on rose pollen. Scientists noted that the thrips population increased in the spring and decreased dramatically during the summer. The researchers hypothesized that food abundance was the limiting factor for the population. Which of the following types of data would be most useful for the scientists to collect at regular intervals on a designated test plot of rose plants?
(A) Amount of sunlight (hours/day)
(B) Mean temperature (Degrees C)
(C) Density of rose pollen produced (g/m2)
(D) Amount of pollen produced by each flower (g/flower)
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