Historical data suggest that snowshoe-hare population cycles are caused by Canada lynx predation. Modern research has ________
a. confirmed this hypothesis and shown that lynx starve after having depressed the hare population
b. demonstrated that snowshoe hares cycle even in captivity, indicating a genetic basis for variations in density
c. as yet been unable to explain the cyclic changes in hare density
d. shown that multiple factors, such as raptor predation and plant interactions produce oscillations even in the absence of lynx
d
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In phloem movement, which of the following does not serve as a source?
a. photosynthesizing cells in a leaf b. roots c. photosynthesizing cells in a stem d. food storage cells in a stem e. soil
The basic method of DNA sequencing is the Sanger method
a. True b. False
If a population of 1000 individuals has 160 aa genotypes, 320 Aa genotypes, and 520 AA genotypes,
the allele frequency of the dominant allele (A) is: a. 0.16 b. 0.42. c. 0.52. d. 0.68. e. 0.89.
Darwin's proposal that organisms that are better suited to their environment are more likely to survive and reproduce is termed ________
Fill in the blank(s) with correct word