Insights Static Quiz -428, 2019
Environment
INSIGHTS STATIC QUIZ 2019
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Question 1 of 5
1. Question
Consider the following statements.
- Primary productivity depends on the plant species inhabiting a particular area and it varies in different types of ecosystems.
- Since oceans occupy about 70 per cent of the surface, the productivity of the oceans is more compared to the productivity on the land.
Which of the above statements is/are correct?
Correct
Solution: a)
Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis.
Primary productivity depends on the plant species inhabiting a particular area. It also depends on a variety of environmental factors, availability of nutrients and photosynthetic capacity of plants. Therefore, it varies in different types of ecosystems. The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter. Of this, despite occupying about 70 per cent of the surface, the productivity of the oceans are only 55 billion tons.
Rest of course, is on land.
Incorrect
Solution: a)
Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis.
Primary productivity depends on the plant species inhabiting a particular area. It also depends on a variety of environmental factors, availability of nutrients and photosynthetic capacity of plants. Therefore, it varies in different types of ecosystems. The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter. Of this, despite occupying about 70 per cent of the surface, the productivity of the oceans are only 55 billion tons.
Rest of course, is on land.
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Question 2 of 5
2. Question
The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs
Correct
Solution: b)
Incorrect
Solution: b)
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Question 3 of 5
3. Question
With reference to ecosystem service, which of the following are the examples of regulating services?
- Carbon sequestration
- Hydrological cycle
- Ensuring genetic diversity
- Provision of natural medicines
Select the correct answer code:
Correct
Solution: a)
Provision of natural medicines doesn’t constitute regulating services of ecosystem.
Regulating services are defined as the benefits obtained from the regulation of ecosystem processes such as climate regulation, natural hazard regulation, water purification and waste management, pollination or pest control.
Provisioning services are the products obtained from ecosystems such as food, fresh water, wood, fiber, genetic resources and medicines.
Incorrect
Solution: a)
Provision of natural medicines doesn’t constitute regulating services of ecosystem.
Regulating services are defined as the benefits obtained from the regulation of ecosystem processes such as climate regulation, natural hazard regulation, water purification and waste management, pollination or pest control.
Provisioning services are the products obtained from ecosystems such as food, fresh water, wood, fiber, genetic resources and medicines.
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Question 4 of 5
4. Question
Consider the following statements.
- Microplastics are small pieces of plastic, less than 5 mm in length, that occur in the environment as a consequence of plastic pollution.
- Microplastics are present in cosmetics, synthetic clothing, plastic bags and bottles.
- Normal Plastic is not biodegradable, whereas Microplastics are biodegradable.
Which of the above statements is/are correct?
Correct
Solution: a)
Microplastics, small pieces of plastic, less than 5 mm (0.2 inch) in length, that occur in the environment as a consequence of plastic pollution. Microplastics are present in a variety of products, from cosmetics to synthetic clothing to plastic bags and bottles. Many of these products readily enter the environment in wastes.
Microplastics are not biodegradable. Thus, once in the environment, primary and secondary microplastics accumulate and persist.
Incorrect
Solution: a)
Microplastics, small pieces of plastic, less than 5 mm (0.2 inch) in length, that occur in the environment as a consequence of plastic pollution. Microplastics are present in a variety of products, from cosmetics to synthetic clothing to plastic bags and bottles. Many of these products readily enter the environment in wastes.
Microplastics are not biodegradable. Thus, once in the environment, primary and secondary microplastics accumulate and persist.
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Question 5 of 5
5. Question
Consider the following statements about Ethanol.
- In India, ethanol is produced from sugarcane only.
- It allows the engine to more completely combust the fuel.
- Ethanol is considered as non-renewable fuel.
Which of the above statements is/are correct?
Correct
Solution: b)
Ethanol, an anhydrous ethyl alcohol having chemical formula of C2H5OH, can be produced from sugarcane, maize, wheat, etc which are having high starch content. In India, ethanol is mainly produced from sugarcane molasses by fermentation process. Ethanol can be mixed with gasoline to form different blends. As the ethanol molecule contains oxygen, it allows the engine to more completely combust the fuel, resulting in fewer emissions and thereby reducing the occurrence of environmental pollution. Since ethanol is produced from plants that harness the power of the sun, ethanol is also considered as renewable fuel.
Incorrect
Solution: b)
Ethanol, an anhydrous ethyl alcohol having chemical formula of C2H5OH, can be produced from sugarcane, maize, wheat, etc which are having high starch content. In India, ethanol is mainly produced from sugarcane molasses by fermentation process. Ethanol can be mixed with gasoline to form different blends. As the ethanol molecule contains oxygen, it allows the engine to more completely combust the fuel, resulting in fewer emissions and thereby reducing the occurrence of environmental pollution. Since ethanol is produced from plants that harness the power of the sun, ethanol is also considered as renewable fuel.
