Environment and Ecol
Q. 1.Consider the following statement 1. Water striders are group of insects adapted to life on surface of water, using surface tension to their advantage. 2. Their presence serves as indicator of water of water quality. 3. also play important role in food chain in river ecosystem Choose the correct code: a) 1, and 2 (b) 2 and 3 (c) 1 and 3 (d) 1, 2 and 3
Answer: d Explanation: . Scientists from Zoological Survey of India (ZSI) have discovered new species of water strider named Ptilomera nagalanda Jehamalar and Chandra in Nagaland. It was found in Intanki river.lt is only found in rocky, fast flowing streams and rivers that are not exposed to lot of sunlight. Their presence serves as indicator water of water quality and also play important role in food chain in river ecosystem as they feed on mosquito larva .
Q.2. Consider the following statement about international energy agency (IEA) 1. IEA is an inter-governmental organization established in 1974 as per framework of the Organisation for Economic Co-operation and Development (OECD) 2. India is not a member of IEA Choose the correct code: a) 1 only (b) 2 only c) both (d) none
Answer: a Explanation: It was established in the wake of the 1973 oil crisis Presently it has 30 member countries including India. It is headquartered in Paris, France. Its prime focus is on the "3Es" of effectual energy policy: energy security, India. tis headquartered in pas economic development and environmental protection. ACC According to International Energy Agency (IEA), the global energy-related carbon dioxide (CO2) emissions rose to historic high of 32.5 gigatonnes in 2017
Q.3. Consider the following 1. States with maximum Forest cover (in terms of area) is Madhya Pradesh 2. India is ranked 10th in world, with 24.4% of land area under forest and tree cover Choose the correct code: a) 1 only(b) 2 only (c) both (d) none
Answer: c Explanation: The latest report (state forest report 2017) states that, India posted a marginal 0.21% rise in the area under forest between 2015 and 2017. India's northeast showed a decrease in the forest cover. In terms of percentage of forest cover with respect to the total geographical area, Lakshadweephas the highest forest cover
Q.4. The reduction in phytoplankton of an ocean may lead to 1. Reduction in The ocean as a carbon sink 2. Drastically increase in density of ocean water 3. Adverse affect on food chain in the ocean Choose the correct code: a) 1 and 2 only (b) 2 only (c) 1 and 3 (d) all of the above
Answer: d Explanation: The reduction in population of phytoplankton may reduce the maount of carbon dioxide drawn out of the atmosphere and transferred to the deep ocean for long term storage. It will also reduce number of fishes in sea.
Q.5. which of the statement regarding bioremediation is correct 1. it is a waste management technique that involves the use of organisms to remove or neutralize pollutants from a contaminated site. Bioleaching is techniques related to bioremediation. 2. Choose the correct code: a) 1and 2 only (b) 2 only 1 only (d) none (a) none
Answer:c Explanation: .peatlands are wetlands that contain mixture of decomposed organic material, partially submerged in layer of water, lacking oxygen. They are globally important carbon store. The unregulated exploitation of peatlands can potentially be detrimental to environment and to climate, as it could release carbon emissions that have been locked in for millennia. The Cuvette Centrale region in Congo Basin is world's largest natural tropical peatlands, which are about size of England. It stores three years equivalent of global greenhouse gas emissions .
Biotechnology from Bangalore university, currently preparing for civil services...loves singing, writing poems,thoughts and lyrics.....