Recent questions tagged class12

Give any six features of the human genome.

asked Jul 23, 2017 by pady_1

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A few statements are given below followed by a set of terms. Pick the correct term and write it agai

asked Jul 20, 2017 by pady_1

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<div>How can you, as an individual , prevent the loss of biodiversity?</div><div>We as individuals c

asked Jul 20, 2017 by pady_1

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How has DDT caused decline in bird population?

asked Jul 12, 2017 by pady_1

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What is the main idea behind “Joint Forest Management Concept” introduced by the Government of I

asked Jul 12, 2017 by pady_1

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How can slash and burn agriculture become environment friendly?

asked Jul 12, 2017 by pady_1

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Why has National forest commission of India recommended a relatively larger forest cover for hills t

asked Jul 12, 2017 by pady_1

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What is hybrid vehicle technology? Explain its advantages with a suitable example.

asked Jul 12, 2017 by pady_1

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What are the three major kinds of impurities in domestic waste water?

asked Jul 12, 2017 by pady_1

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What do you understand by Snow-blindness?

asked Jul 12, 2017 by pady_1

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It is a common practice to plant trees and shrubs near the boundary walls of the buildings. What pur

asked Jul 12, 2017 by pady_1

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Name one green house gas and its possible source of production on a large scale. What are the harmfu

asked Jul 12, 2017 by pady_1

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Is it true that if the dissolved oxygen level drops to zero, the water will become septic. Give an e

asked Jul 12, 2017 by pady_1

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Is it true that carpets and curtain/drapes placed on the floor or wall surface can reduce the noise

asked Jul 12, 2017 by pady_1

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What is cultural eutrophication?

asked Jul 12, 2017 by pady_1

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What is the best solution for the treatment of electronic wastes?

asked Jul 12, 2017 by pady_1

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What is reforestation?

asked Jul 12, 2017 by pady_1

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What do you understand by biomagnification?

asked Jul 12, 2017 by pady_1

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What is an algal bloom?

asked Jul 12, 2017 by pady_1

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Name an industry which can cause both air and thermal pollution and as well as eutrophication.

asked Jul 12, 2017 by pady_1

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Mention any two examples of plants used as wind breakers in the agricultural fields.

asked Jul 12, 2017 by pady_1

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Blends of polyblend and bitumen, when used, help to increase road life by a factor of three. What is

asked Jul 12, 2017 by pady_1

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What is the raw material for polyblend?

asked Jul 12, 2017 by pady_1

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It is a common practice to undertake desilting of the overhead water tanks. What is the possible sou

asked Jul 12, 2017 by pady_1

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Name the city in our country where the entire public road transport runs on CNG.

asked Jul 12, 2017 by pady_1

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In which year was the Air (prevention and control of pollution) Act amended to include noise as air

asked Jul 12, 2017 by pady_1

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What is organic farming? Discuss the benefits of organic farming as a viable practice in the context

asked Jul 12, 2017 by pady_1

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How does an electrostatic precipitator work?

asked Jul 12, 2017 by pady_1

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Use of lead free petrol or diesel is recommended to reduce the pollution emitted by automobiles. Wha

asked Jul 12, 2017 by pady_1

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<div>Species diversity decreases as we move away from the equator towards the poles. What could be t

asked Jul 12, 2017 by pady_1

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<div>Though the conflict between the humans and wildlife started with the evolution of man, the inte

asked Jul 12, 2017 by pady_1

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Elaborate how invasion of alien species reduces the species diversity of an area?

asked Jul 12, 2017 by pady_1

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What is co-extinction? Explain with a suitable example.

asked Jul 12, 2017 by pady_1

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What are sacred groves and their role in biodiversity conservation?

asked Jul 12, 2017 by pady_1

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Humans benefit from diversity of life. Give two examples.

asked Jul 12, 2017 by pady_1

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What criteria should one use in categorizing a species as threatened?

asked Jul 12, 2017 by pady_1

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Can you think of a scientific explanation, besides analogy used by Paul Ehrlich, for the direct rela

asked Jul 11, 2017 by pady_1

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There is a greater biodiversity in tropical/sub tropical regions than in temperate regions. Explain.

asked Jul 11, 2017 by pady_1

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What characteristics make a community stable?

asked Jul 11, 2017 by pady_1

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Is it true that there is more solar energy available in the tropics? Explain briefly.

asked Jul 11, 2017 by pady_1

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Is it possible that productivity and diversity of natural communities remain constant over a time of

asked Jul 11, 2017 by pady_1

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Define the terms (i) Bioprospecting (ii) Endemism

asked Jul 11, 2017 by pady_1

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Why is genetic variation important in the plant Rauwolfia vomitoria?

asked Jul 11, 2017 by pady_1

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Explain as to how protection of biodiversity hot spots alone can reduce upto 30% of the current rate

asked Jul 11, 2017 by pady_1

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What accounts for the greater ecological diversity of India?

asked Jul 11, 2017 by pady_1

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How is presently occurring species extinction different from earlier mass extinctions?

asked Jul 11, 2017 by pady_1

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Suggest a place where one can go to study coral reefs, mangrove vegetation and estuaries. 

asked Jul 11, 2017 by pady_1

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List any two major causes other than anthropogenic causes of the loss of biodiversity. 

asked Jul 11, 2017 by pady_1

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What is the expanded form of IUCN? 

asked Jul 11, 2017 by pady_1

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What does the term 'frugivorous' mean?

asked Jul 11, 2017 by pady_1

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