Biology, 10.12.2019 16:31 ilonkaip6323
In 1939, the use of ddt (a powerful synthetic chemical) as an insecticide was discovered. the united states adopted its widespread use, producing up to 100 million kilograms per year (200 million pounds per year). twenty years later, severe side effects started to be reported as a result of ddt use. which was an advantage of using ddt?
insect and pest populations decreased
birth defect rates increased
cancer rates increased
fertility rates decreased
Answers: 3
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Which example would the nurse consider to be a part of systems thinking theory?
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Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america
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Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .
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Biology, 22.06.2019 13:30
Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil
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In 1939, the use of ddt (a powerful synthetic chemical) as an insecticide was discovered. the united...
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