For the following question, consider each of the choices separately and select all that apply获得更多gre考
1. The author cites all of the following as evidence that Africanized bees resistance to Varroa jacobsoni is superior to that of European bees:
A Varroa jacobsoni is killing many bee colonies in Europe.
B Beekeepers in Brazil have not used preventive measures to protect their colonies.
C At least some European bee colonies have been saved by preventive measures.
2. Select the sentence that indicates one possible reason the Africanized bees in Brazil have successfully resisted Varroa jacobsoni .
3. The authors argument regarding the resistance of Africanized bees to Varroa jacobsoni would be most weakened if which of the following were true?
○A The bees in Brazil were resistant before being Africanized.
○B The number of bee colonies in North American increased dramatically whereas the number in Brazil remained unchanged.
○C Mites found in European bees reproduce at a faster rate than mites of identical species found in the bees in Brazil.
○D Africanized bees retain many of the characteris- tics of European bees.
○E Bee colonies in Europe continue to produce greater quantities of honey than do those in Brazil.
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