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Pre-Test
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1
Which one of the following is an extrinsic limiting factor?
A)fights between males over females
B)competition over food
C)death due to unusual weather
D)increased sexual activity
2
Listed below are the natality and mortality numbers for four populations. All other things being equal, which population will experience the greatest growth?
A)natality = 26/1000; mortality = 17/1000
B)natality = 19/1000; mortality = 8/1000
C)natality = 13/1000; mortality = 25/1000
D)natality = 11/1000; mortality = 5/1000
3
An exponential increase:
A)100, 200, 300, 400, 500.
B)1, 2, 3, 4, 5.
C)2, 4, 8, 16, 32.
D)5, 10, 15, 20, 25.
4
Increasing a population's food supply may directly increase
A)environmental resistance on the population.
B)the carrying capacity for the population.
C)the population's mortality.
D)population pressure.
5
When yeasts ferment the sugar in grape juice, they produce ethyl alcohol. When alcohol concentration reaches a certain level, the yeast population declines and eventually dies. In this example, population growth of the yeast is stopped by
A)limited space.
B)limited food supply.
C)accumulation of waste.
D)disease.





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