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Practice MCQ's- Environment & Ecology 8
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Sudarshan Gurjar is teaching live on Unacademy Plus

Sudarshan Gurjar
Top & Verified Plus Educator. Winner of Perfect Presence Award!! Mentored more than 10,000 students.

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sir, please complete this course.... it really have so much importance for us.....
  1. Aboutme SUDARSHAN GURAR Verified Educator & Plus Educator at Unacademy Mentored more than 10,000 students. Teaching Geography since 2013 ( UPSC category). A Geography Learner. COURSES AVAILABLE ON PLATFORM Geography through Maps. Current Affairs & In-depth Editorial Analysis. Special Current Affairs on Madhya Pradesh & many more. PLUS CoURSES Current Affairs & In-depth Editorial Analysis. unacademy


  2. UPSC PLUS COURSE unacademy Sudarshan Gurjar Geography & Current Issues of Environment unacademy


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  4. Consider the following pairs: Microorganism 1. Cyanobacteria fixes atmospheric nitrogen in aquatic Use environment 2. Mycorrhiza : increases tolerance to soil salinity 3. Deinococcus radiodurans detoxify mercury contamination released from radioactive waste. Which of the pairs given above is/are correctly matched? (a) 1 only (c) 1 and 3 only( (b) 1, 2 and 3 (d) 2 and 3 only


  5. .Answer B Cyanobacteria- Used to fix atmospheric nitrogen in aquatic milieu Mycorrhiza- Increase tolerance to soil salinity Deinococcus radiodurans - Used to detoxify toluene and mercury contamination released from radioactive waste.


  6. Which of the following can be used in the production of second generation ethanol to power motor vehicles? 1. Rice straw 2. Jatropha 3. Bamboo Select the correct answer using the code given below (a) 2 only (c) 1 and 3 only (b) 1 and 2 only (d) 1, 2 and 3


  7. Answer .First generation biofuels are made from the sugars and vegetable oils found in arable crops, which can be easily extracted using conventional technology. .In comparison, second generation biofuels are made from lignocellulosic biomass or woody crops, agricultural residues or waste, which makes it harder to extract the required fuel. plant parts, such as straw or corn cobs. etc to power vehicles .Second generation ethanol draws on previously unused (ligno-) cellulosic . These can be made from bamboo, rice straw, wheat straw, cotton straw Jatropha oil is mainly converted into biodiesel for use in diesel engines, not ethanol.