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hjlf
2 years ago
13

Which problem does the Montreal Protocol attempt to remedy?

Biology
1 answer:
madreJ [45]2 years ago
5 0

Answer:

A.The hole in the ozone layer

Explanation:

• Montreal protocol is an international treaty that was signed to control the use of substances that are resulting in the depletion of the ozone hole.

This treaty was signed in the year 1987 and became effective form 1989.

• Since the time that this treaty has come into force, there has been a significant improvement in the ozone hole that was observed over Antarctic as it's size has decreased.

• This improvement has been possible because the treaty helped to phase out chemicals such as chlorofluorocarbons, carbon tetrachloride, etc. that are responsible for ozone hole depletion.

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The correct answer will be option-D

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The differentiation and specialization are controlled at the gene level by different patterns of gene expression. The pattern of gene expression is not fully understood during development but research have shown that the gene expression is influenced by the different environmental signals and internal regulators.

Thus, option-D is the correct answer.

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