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Blacknijapowerr Blacknijapowerr
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6 years ago
What change(s) can have detrimental effects on the human food supply?
 
  a. 1035 of all U.S. crops are lost to insect damage each year.
  b. 10 billion per year are spent on insecticides by American farmers.
  c. Natural selection can create an arms race between pest species that feed on crops and pesti-cides developed by humans.
  d. All of the above.
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6 years ago
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