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slega [8]
4 years ago
14

Scientists have observed that when air pollution is significantly reduced, the frequency of the melanic form of peppered moths:_

_____.
Biology
1 answer:
zhenek [66]4 years ago
4 0

Answer:

The correct answer is : decreases

Explanation:

The development of the peppered moth is a transformative event of directional color change in the moth populace as a result of air contamination during the Industrial Revolution.

The melanic or dark color type of the peppered moth was not known before pollution level was low before 1811. Hence the decrease in pollution level in atmosphere will lowers the frequency of the melanic form of peppered moths.

Thus, the correct answer is : decreases.

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The correct answer is - 1,180 km.

North America and Europe move away from one another, though the two plates, the North American and Eurasian are merging together on the other side. Since the rate of moving away is 2 cm per year, and the current distance is 1,184 km between North America and Europe, the distance between them 200,000 years ago was 1,180 km.

To get to the result we only need to multiply the number of years with the annual movement

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Than divide the result with 100,000, as that is how much cm are in one km

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And we get 4 km, in this case 4 km less, thus the distance between the two, 200,000 years ago, was 1,180 km.

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