Biodiversity forms the basis for human existence in the following ways: 1. Soil formation 2. Prevention of soil erosion 3. Recycling of waste 4. Pollination of crops Select the correct answer using the codes given below : UPSC - 2011
Consider the following : 1. Photosynthesis. 2. Respiration. 3. Decay of organic matter. 4. Volcanic action. Which of the above adds carbon dioxide to the carbon cycle on Earth? UPSC - 2011
Human activities in the recent past have caused an increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of 1. It escapes 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? UPSC - 2011
The Millennium Ecosystem Assessment describes the following major categories
of ecosystem services--provisioning, supporting, regulating, preserving and
Cultural, which one of the following is supporting service? UPSC - 2012
