1. The author of the text is primarily concerned with
[A] discussing two categories of factors that control population growthand assessing their relative importance.
[B] describing how growth rates in natural populations fluctuate overtime and explaining why these changes occur.
[C] proposing a hypothesis concerning population size and suggesting waysto test it.
[D] posing a fundamental question about environmental factors inpopulation growth and presenting some currently accepted answer.
2. It can be inferred from the text that the author considers thedichotomy discussed to be
[A] applicable only to erratically fluctuating populations.
[B] instrumental, but only if its limitations are recognized.
[C] dangerously misleading in most circumstances.
[D] a complete and sufficient way to account for observed phenomena.
3. According to the text, all of the following behaviors have beenexhibited by different populations EXCEPT
[A] roughly constant population levels from year to year.
[B] regular cycles of increases and decreases in numbers.
[C] erratic increases in numbers correlated with the weather.
[D] unchecked increases in numbers over many generations.
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