EVS (Environmental Science)
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(Q) Energy flows in the food chain?
Answer:- (a) unidirectional
In an ecosystem, the food chain is the sequence of different types of organisms, through which organisms are related as food and eaters and through them the flow of food energy in one direction ie, is unidirectional.
(Q) Causes environmental imbalance?
Answer:- (d) All of them.
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(Q) Which of the following is not a component of environmental studies?
Answer:- (d) solar system
Under the study of environment, factors like Atmosphere, Water Circle, Lithosphere and Biosphere (Human) are studied. Solar board is not studied under environmental studies.
(Q) 'Ten percent rule' given by ?
Answer:- (a) Reymond Lindeman
The 'ten percent rule' has been given by Lindmann in 1942 AD. This rule is related to energy consumption.
(Q) Environment is a source of which of the following?
Answer:- (d) All of them.
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(Q) Biological environment includes which of the following?
Answer:- (d) all of the above
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(Q) Which of the following options is an environmental issue?
Answer:- (d) (i), (ii) and (iii)
All the factors affecting the environment (social, economic, political and climate) are called environmental issues. Such as water conservation, waste disposal, population growth, pollution etc.
(Q) Which of the following food chain is not of exponential ground?
Answer:- (c) Plankton, Fish, Whale
Plankton, fish, whale food chain is of aquatic area. Plankton is a microscopic grass that feeds on fish.
(Q) Who is helpful in building humus?
Answer:- (b) decomposer
In the context of agriculture, the topmost layer of soil is called humus, in which there is a lot of organic matter. Decomposers play an important role in the creation of humus
(Q) The result of excessive flow is ?
Answer:- (b) Soil erosion
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