Q65.In the r vs. K selection classification, which of the following best describ
ID: 36209 • Letter: Q
Question
Q65.In the r vs. K selection classification, which of the following best describes an r-selected species?
a-Individuals grow larger, live longer, reproduce later, and invest more resources into each offspring.
b-Individuals reproduce early and often, maximizing the population growth rate.
Q66. In some climates, streams are subject to frequent flash floods that scour the stream bed, removing
nearly all of the vegetation. Between floods, plants may colonize and grow in well-lit stream channels. Which plant strategy, of those described by Grime (see figure on right), do you think would be most prevalent in the channels of streams with frequent flash floods?
a-Lower right-hand corner (Ruderal)
b-Lower left-hand corner (Stress-tolerant)
c-Top corner (Competitive)
Q67. After the Yellowstone fires, the first plants to return were ruderal species that were well adapted to disturbance. Over time, assuming no new fires, these species are replaced by other plants that may have different strategies. Which type of life histories would become more common in this area over time?
a-Competitive (top corner)
b-Stress-tolerant (lower left corner)
c-Ruderal (lower right corner)
Q65.In the r vs. K selection classification, which of the following best describes an r-selected species? a-Individuals grow larger, live longer, reproduce later, and invest more resources into each offspring. b-Individuals reproduce early and often, maximizing the population growth rate. Q66. In some climates, streams are subject to frequent flash floods that scour the stream bed, removing nearly all of the vegetation. Between floods, plants may colonize and grow in well-lit stream channels. Which plant strategy, of those described by Grime (see figure on right), do you think would be most prevalent in the channels of streams with frequent flash floods? a-Lower right-hand corner (Ruderal) b-Lower left-hand corner (Stress-tolerant) c-Top corner (Competitive) Q67. After the Yellowstone fires, the first plants to return were ruderal species that were well adapted to disturbance. Over time, assuming no new fires, these species are replaced by other plants that may have different strategies. Which type of life histories would become more common in this area over time? a-Competitive (top corner) b-Stress-tolerant (lower left corner) c-Ruderal (lower right corner)Explanation / Answer
65. b. Individuals reproduce early and often, maximising the population growth.
66. a. Lower right hand corner (ruderals).
67. A. Competitive ( Top corner).
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