Which feature of some species of blue green algae helps promoted them as bio-fertilizers?
Subject: Environment
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Which bacterial strain, developed from natural isolated by genetic manipulations, can be used for treating oil spills
Which bacterial strain, developed from natural isolated by genetic manipulations, can be used for treating oil spills?
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The United Nations Framework Convention on Climate Change (UNFCCC) is and international treaty drawn at
The United Nations Framework Convention on Climate Change (UNFCCC) is and international treaty drawn at
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Hydrogen fuel cell vehicles produce one of the following as ‘exhaust’
Hydrogen fuel cell vehicles produce one of the following as ‘exhaust’
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A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is: Food crop – Rat -Snake – Hawk. In this food chain, the highest concentration of the pesticide would accumulate in which one of the following
A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is: Food crop – Rat -Snake – Hawk. In this food chain, the highest concentration of the pesticide would accumulate in which one of the following?
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Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because
Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because
1. its escape into the outer stratosphere
2. the photosynthesis by phytoplankton in the oceans
3. the trapping of air in the polar ice caps.
Which of the statements given above is/are correct? -
In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material
In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material?
1. Unlike traditional asphalt, bio-asphalt is not based on fossil fuels.
2. Bioasphalt can be made from non-renewable resources.
3. Bioasphalt can be made from organic waste materials.
4. It is eco-friendly to use bioasphalt for surfacing of the roads.
Which of the statements given above are correct? -
When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because
When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because?
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A state in India has the following characteristics
A state in India has the following characteristics:
1. Its northern part is arid and semi-arid.
2. Its central part produces cotton.
3. Cultivation of cash crops is predominant over food crops. Which one of the following states has all of the above characteristics? -
In the context of ecosystem productivity, marine upwelling zones are important as they increase marine productivity by bringing the
In the context of ecosystem productivity, marine upwelling zones are important as they increase marine productivity by bringing the: