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Ecology is best defined as the study of: |
The relationships between all living organisms and their environments. |
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On average, which leaves more offspring that survive to become adults and reproduce: a pair of elephants or a pair of rabbits? |
If both populations are stable, the pair of elephants and the pair of rabbits will leave the same number of offspring that survive to become adults and reproduce. |
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In a population exhibiting logistic growth, the rate of population growth is greatest when N is: |
0.5K |
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In a population, as N approaches K, the logistic growth equation predicts that: |
The growth rate will approach zero. |
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The number of individuals that can be supported in a given habitat is the: |
None of the above: innate capacity for increase, biotic potential, density-dependant, or density-independant |
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Which of the following statements about maximum sustainable yield is incorrect? |
The maximum sistainable yield for a population is a useful management guideline for harvesting plant products such as timber, but is not helpful for managing animal populations. |
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Dr. David Reznick has studied life history evolution in guppies that live in stream in Trinidad. Guppies are found in two different types of habitat: sites where predation is high, and sites where predation is low. Which of the following life history characteristics would you expect to evolve in a guppy population living in a high-predation site? |
Increased egg number |
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The death rate of organisms in a population exhibiting a type III survivorship curve is: |
Lower after the organisms survive beyond the earliest age groups. |
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Which of the following is a major tradeoff in life histories? |
Growth for reproduction |
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Natural Selection: |
Cannot weed out from a population any alleles that do not reduce an individual’s relative reproductive success, even if these alleles increase an individual’s risk of dying. |
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Which of the following statements about the hazard factor of a population is incorrect? |
It is a measure of how quickly the individuals in a population age. |
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Life extension: |
Has been acheived using labratory selection for delayed reproduction. |
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A population pyramid: |
Represents the number of individuals in various age groups in a population. |
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A primary difference between the age pyramids of industrialized and developing countries is that: |
In developing countries, much larger proportions of the population are in the youngest age groups. |
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Which statement best describes expectationbs for the world’s human population by the year 2010? |
It will exceed 7 billion if the current rat eof increase continues. |
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