General Knowledge
ENVIRONMENTAL SCIENCE MCQs
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Answer: Option C. -> Oxygen
Oxygen is the gas which is likely to be reduced in the atmosphere by deforestation. One of the most dangerous threats to life on earth is the increase in pollution which is caused because of the increase in the concentration of carbon dioxide and carbon monoxide in the environment.
Oxygen is the gas which is likely to be reduced in the atmosphere by deforestation. One of the most dangerous threats to life on earth is the increase in pollution which is caused because of the increase in the concentration of carbon dioxide and carbon monoxide in the environment.
Answer: Option A. -> Nitrogen, oxygen
In a volume of air near the earth's surface, nitrogen occupies 78 percent and oxygen nearly 21 percent.
In a volume of air near the earth's surface, nitrogen occupies 78 percent and oxygen nearly 21 percent.
Answer: Option C. -> Oxygen
Oxygen is released during the process of photosynthesis.
Oxygen is released during the process of photosynthesis.
Answer: Option D. -> Symbiotic association between a fungus and roots of higher plants
A mycorrhiza is a symbiotic association between a green plant and a fungus. The plant makes organic molecules such as sugars by photosynthesis and supplies them to the fungus, and the fungus supplies to the plant water and mineral nutrients, such as phosphorus, taken from the soil.
A mycorrhiza is a symbiotic association between a green plant and a fungus. The plant makes organic molecules such as sugars by photosynthesis and supplies them to the fungus, and the fungus supplies to the plant water and mineral nutrients, such as phosphorus, taken from the soil.
Answer: Option A. -> Commensalism
Commensalism - an association between two organisms in which one benefits and the other derives neither benefit nor harm. It does not promote coevolution.
Commensalism - an association between two organisms in which one benefits and the other derives neither benefit nor harm. It does not promote coevolution.
Answer: Option A. -> Decibels
Although the units for sound intensity are technically watts per meter squared, it is much more common for it to be referred to as decibels, dB. A decibel is a ratio of the observed amplitude, or intensity level to a reference, which is 0 dB.
Although the units for sound intensity are technically watts per meter squared, it is much more common for it to be referred to as decibels, dB. A decibel is a ratio of the observed amplitude, or intensity level to a reference, which is 0 dB.
Answer: Option B. -> Rio de Jeneiro in 1992
The United Nations Conference on Environment and Development (UNCED), also known as the Rio de Janeiro Earth Summit, the Rio Summit, the Rio Conference, and the Earth Summit (Portuguese: ECO92), was a major United Nations conference held in Rio de Janeiro from 3 to 14 June in 1992.
The United Nations Conference on Environment and Development (UNCED), also known as the Rio de Janeiro Earth Summit, the Rio Summit, the Rio Conference, and the Earth Summit (Portuguese: ECO92), was a major United Nations conference held in Rio de Janeiro from 3 to 14 June in 1992.
Answer: Option A. -> River segments
River segments is the largest in terms of scale.
River segments is the largest in terms of scale.
Answer: Option B. -> No environmental resistance
Exponential growth occurs when there is no environmental resistance.
Exponential growth occurs when there is no environmental resistance.
Answer: Option B. -> Deforestation
Deforestation, clearance, clearcutting or clearing is the removal of a forest or stand of trees from land which is then converted to a non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests.
Deforestation, clearance, clearcutting or clearing is the removal of a forest or stand of trees from land which is then converted to a non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests.
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