Conserving Biodiversity
Chapter 16, Problem 11
There are fewer lions in Africa's Serengeti than there are zebras. This is principally because . a. zebras tend to drive off lions; b. lions compete directly with cheetahs, whereas zebras do not have any competitors; c. zebras have mutualists that increase their population, whereas lions do not; d. there is less energy available in zebras to support the lion population than there is in grass to support the zebras; e. zebras are a keystone species, whereas lions are not
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Related Practice
Textbook Question
Which of the following is an example of a mutualistic relationship?
a. moles catching and eating earthworms from the moles' underground tunnels;
b. cattails and reed canary grass growing together in wetland soils;
c. cleaner fish removing and eating parasites from the teeth of sharks;
d. Colorado potato beetles consuming potato plant leaves;
e. more than one of the above
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Textbook Question
The risks faced by small populations include . a. erosion of genetic variability through genetic drift; b. decreased fitness of individuals as a result of inbreeding; c. increased risk of experiencing natural disasters; d. A and B are correct; e. A, B, and C are correct
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Textbook Question
One advantage of preserving more than one population of an endangered species at more than one location is .
a. a lower risk of extinction of the entire species if a catastrophe strikes one location;
b. higher levels of inbreeding in each population;
c. higher rates of genetic drift in each population;
d. lower numbers of heterozygotes in each population;
e. higher rates of habitat fragmentation in the different locations
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