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Volgvan
3 years ago
14

Why did the United States ban the use of DDT?​

Biology
2 answers:
kherson [118]3 years ago
7 0

Explanation:

The U.S. Department of Agriculture, the federal agency with responsibility for regulating pesticides before the formation of the U.S. Environmental Protection Agency in 1970, began regulatory actions in the late 1950s and 1960s to prohibit many of DDT's uses because of mounting evidence of the pesticide's declining

DDT was used in the second half of World War II to control malaria and typhus among civilians and troops. Its publication was a seminal event for the environmental movement and resulted in a large public outcry that eventually led, in 1972, to a ban on DDT's agricultural use in the United States.

stira [4]3 years ago
6 0

DDT was used during second world war to control malaria among the troops and the civilians. Later, it was used as pesticide in agricultural and household practices. Due to its excessive use it entered into the food chain and its amount in the food crossed the permissible level. So, it was banned by United States.

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Explanation:

Saturn is the sixth planet in the solar system. It is one of the four Jovian planets that are predominantly made up of gas.

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The four largest satellites orbiting Saturn are:

  name of satellite               diameter(km)

            Dione                             1123

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            Rhea                               1527

             Titan                              5149

learn more:

Planet brainly.com/question/10934170

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3 0
3 years ago
Which hypothesis helps to explain why all organisms share the same genetic code?
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Answer:

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The reason for the first answer is due to the hypothesis that indicates that life (organic molecules) arose from inorganic molecules synthesized from the amino acids in those energy vents. This is called the metabolism first hypothesis. The Miller-Urey Experiment provided evidence that organisms could rise from inorganic molecules (they simulated under the conditions you would see on early Earth). The second hypothesis is the RNA World hypothesis (second answer) which suggests that the formation of RNA that could replicate (possible due to mutation or evolution), led to life that could preserve its genetic integrity through replication (greater stability to the organism) and create lipid bi-layer membranes/other organelles. Some scientists support the Metabolism First Hypothesis, while others are skeptical (this goes for the RNA World Hypothesis as well). However, the RNA World Hypothesis is for more reasonable in the fact that its main point is the fact that RNA molecules were able to replicate and maintain genetic stability despite early Earth conditions. Although either hypothesis could explain why all organisms share the same genetic code, the RNA World Hypothesis better explains the universality of DNA/RNA of genes that we see today.

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2 years ago
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