An ecosystem must have continuous external source of
A. minerals
B. energy
C. food
D. All of the above
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When number of food chains is interlocked this is called
A. food link
B. food chain
C. food web
D. pyramid
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Rain water harvesting is a major method implemented for_____________
A. Water Conservation
B. Soil Conservation
C. Forest conservation
D. Ecological conservation
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The pyramid of numbers is inverted in the case of
A. parasitic food chain
B. Grassland ecosystem
C. Forest ecosystem
D. lake ecosystem
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Burning of coal produces oxides of sulphur and nitrogen which combined with water vapor leads to
A. acid rain
B. brackish water
C. forest fire
D. soil pollution
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What is deforestation?
A. Product of forest
B. destruction of forest
C. Forest Protection
D. None
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Lions are found in
A. Western Ghats
B. Corbett National Park
C. Forests of Madhya Pradesh
D. Gir forests
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Favorable morphological and physiological response to a change in environment is called
A. Preadaptation
B. Ecotyping
C. Formation of ecophenes
D. Acclimatisation
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Which among the following is related to the word Mesoderm ?
A. Anatomically advanced animals having all three germ layers
B. No membrane-bound organelles, no peptidoglycan in cell walls, introns
C. Forms blood and bone (leads to complex internal organs)
D. Binomial system of classification
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Plantation produces around __________ percentage of industrial woods.
A. twenty
B. thirty
C. forty
D. fifty
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__________ is derived recently from living organisms and their metabolic products.
A. Biofuel
B. Biomass
C. Fossil fuel
D. Gobar gas
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According to the Stefan-Boltzmann law, the radiative energy emitted by one square meter of an object is equal to a constant multiplied by its temperature raised to the _______ power.
A. Negative third
B. Zeroeth
C. Fourth
D. Tenth
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The nation whose government is promoting large families because of an aging population and low fertility rate is
A. the United States
B. India
C. France
D. China
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_________ is the first country to have phased out the CFCs and HCFCs which are responsible for the depletion of the ozone layer.
A. Denmark
B. Germany
C. France
D. Spain
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The pyramid of biomass is inverted in
A. forest ecosystem
B. grassland ecosystem
C. fresh water ecosystem
D. tundra
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Which of the following is the major cause of pollution?
A. plants
B. man
C. fungi
D. hydrocarbon gases
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Which of the following would be considered to be a biotic component of an environment?
A. Fire
B. Water
C. Fungi
D. Soil
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Bears are usually hunted and killed for their
A. Teeth
B. Skin
C. Gall bladder
D. Nails
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All the genes of a population is called
A. gene pool
B. genome
C. gene bunch
D. gene population
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Viable material of endangered species can be preserved by
A. Gene bank
B. Gene library
C. Gene pool
D. Herbarium
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