A. True
B. False
Answer: Option A
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✅ The correct answer is option A.
General Knowledge
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2172. Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by the:
A. Conduction of heat through the interior of the earth
B. Concentration of earth’s magnetic field lines at the poles
C. Circulation of heat by the atmosphere and oceans
D. The insulating properties of snow
✅ The correct answer is option C.
A radiation inversion is most commonly observed: just above the ground. Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by: the circulation of heat by the atmosphere and the oceans.
A radiation inversion is most commonly observed: just above the ground. Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by: the circulation of heat by the atmosphere and the oceans.
2173. A high Biological Oxygen Demand (BOD) indicates that:
A. water is pure
B. absence of microbial action
C. Low level of microbial pollution
D. High level of microbial pollution
✅ The correct answer is option D.
A high BOD indicates the presence of a large number of microorganisms, which suggests a high level of pollution.
A high BOD indicates the presence of a large number of microorganisms, which suggests a high level of pollution.
2174. Almost all of the earth’s weather occurs in the:
A. Exosphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
✅ The correct answer is option E.
The troposphere is the lowest layer of Earth’s atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere, and almost all weather occurs within this layer.
The troposphere is the lowest layer of Earth’s atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere, and almost all weather occurs within this layer.
2175. _________ 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
✅ The correct answer is option B.
Germany is the first country to have phased out the CFCs and HCFCs which are responsible for the depletion of the ozone layer.
Germany is the first country to have phased out the CFCs and HCFCs which are responsible for the depletion of the ozone layer.
2176. The inherent ability of organisms to reproduce and multiply is called
A. C value
B. biotic potential
C. carrying capacity
D. K value
✅ The correct answer is option B.
The inherent ability of organisms to reproduce and multiply is called biotic potential.
The inherent ability of organisms to reproduce and multiply is called biotic potential.
2177. Flora is the __________ life occurring in a particular region or time
A. plant
B. animal
C. human
D. microbial
✅ The correct answer is option A.
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. The corresponding term for animal life is fauna. Flora, fauna, and other forms of life, such as fungi, are collectively referred to as biota.
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. The corresponding term for animal life is fauna. Flora, fauna, and other forms of life, such as fungi, are collectively referred to as biota.
2178. Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
A. It is upright in shape
B. Its base is broad
C. It shows energy content of different trophic level organisms
D. It is inverted in shape
✅ The correct answer is option D.
It is inverted in shape.
It is inverted in shape.
2179. The complex network of interconnected food chains is called ___________
A. Trophic level
B. Food web
C. Ecological pyramid
D. Ecology chain
✅ The correct answer is option B.
A network of food chains existing together in an ecosystem is known as food web.
A network of food chains existing together in an ecosystem is known as food web.
2180. A heat transfer process in the atmosphere that depends upon the movement of air is:
A. Conduction
B. Absorption
C. Reflection
D. Convection
✅ The correct answer is option D.
Convection is the transfer of heat by the movement of a fluid (liquid or gas) between areas of different temperature. Warm air is less dense than cold air, and so convection currents can form in the presence of a temperature gradient.
Convection is the transfer of heat by the movement of a fluid (liquid or gas) between areas of different temperature. Warm air is less dense than cold air, and so convection currents can form in the presence of a temperature gradient.