A woman has a large garden and decides this year she will not let the pests get beyond control. At the earliest sign of insect pests, she applies an organic insecticide and continues to apply it every month throughout the growing season
The next year the woman decides not to use any insecticides, thinking that she must have eliminated the pests with the prior year's treatments. Unfortunately, the pests reappear in numbers greater than she has ever seen before, and her crops are destroyed. Investigating this phenomenon, she learns that she has just experienced a phenomenon known as A) resurgence.
B) pesticide resistance.
C) natural selection.
D) emergence.
A
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Elephants are more closely related to whales than they are to the mastodons
a. True b. False
Which climate control can lead to both cooling and warming?
A. less atmospheric aerosols B. more carbon dioxide C. more clouds D. less equatorward currents E. more ice surfaces
On October 19, 2007, the storm had moved 600 km (360 mi) eastward. Estimate what the conditions were in Springfield, Illinois, on that day. List what you think the temperature, approximate dew-point temperature, and wind speed and direction were on October 19. Which type of air mass was overhead?
What will be an ideal response?
What was the colony of Portugal in the New World?
A) Argentina B) Peru C) Brazil D) Uruguay E) Paraguay