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Practice Quizzing
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1

In order for the acanthocephalan to infest its host and alter its behavior, it must reach a life stage called a .
2

Studies conducted by Park suggest that infection with the parasite, Adelina, enabled Tribolium castaneum to be a better competitor against Tribolium confusm.
A)TRUE
B)FALSE
3

Which of the following statistical values is used to determine how close a given sample mean is to the true population mean?
A)standard error
B)sample variance
C)sample size
D)standard deviation
4

In the study involving loach minnows, the second sample was larger and therefore, the size of the standard error was considerably .
5

Studies involving lynx and coyote predation on hares indicate that lynx kill more hares when the hare population is declining, while coyotes killed more hares when the hare population is increasing.
A)TRUE
B)FALSE
6

When Krebs studied hare populations in various treatment plots, he found that higher densities were the result of _________.
A)higher survival
B)increased plant growth
C)increased predation
D)higher reproduction
E)all of the above
F)a and d are correct
7

Krebs research on hare population densities suggests that population studies are only successful if performed on a large scale and in the field.
A)TRUE
B)FALSE
8

_______ explains how prey can reduce their individual probability of being eaten by occurring at very high densities.
A)Masting
B)Competitive exclusion
C)Positive phototaxis
D)Herbivory
E)None of the above.





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