CSS :: Ecology and General Silviculture
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91. |
A biotic community comprises: |
A. |
Plants only |
B. |
Animals only |
C. |
Plants and animals |
D. |
Plants or animals |
Answer: Option C
Explanation:
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92. |
Food chains are met with only in the: |
A. |
Sea |
B. |
Forests |
C. |
Deserts |
D. |
In all these places |
Answer: Option D
Explanation:
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93. |
The trophic structure in an ecosystem is infact: |
A. |
Producer-consumer arrangement |
B. |
Refers to grazing food chain only |
C. |
Never forms a food web |
D. |
Never photosynthesis dependent |
Answer: Option A
Explanation:
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94. |
The river mouth ecosystem is called: |
A. |
Estuarine |
B. |
Lotic |
C. |
Lentic |
D. |
None of these |
Answer: Option A
Explanation:
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95. |
Every ecosystem must have a continuous external source of: |
A. |
Energy |
B. |
Oxygen |
C. |
Living organism |
D. |
Bacteria |
Answer: Option A
Explanation:
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96. |
The amount of living matter present in a component population of a particular trophic level is called: |
A. |
Standing crop |
B. |
Standing quality |
C. |
Both (a) & (b) |
D. |
Standing state |
Answer: Option A
Explanation:
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97. |
The pyramid of biomass is variable in some: |
A. |
Grassland ecosystems |
B. |
Pond ecosystems |
C. |
Parasitic ecosystems |
D. |
Forest ecosystems |
Answer: Option B
Explanation:
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98. |
The source of energy in an ecosystem is: |
A. |
sugar stored in plants |
B. |
Light received from the sun |
C. |
Heat liberated during fermentation |
D. |
Heat liberated during respiration |
Answer: Option B
Explanation:
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99. |
Plants constitute the: |
A. |
Third trophic level |
B. |
Fourth trophic level |
C. |
First trophic level |
D. |
Second trophic level |
Answer: Option C
Explanation:
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100. |
The ecosystem exists in a state of 'balance'. Supposing one of the heterotrophs, says the rabbit, multiplies and increases in number suddenly then: |
A. |
The balance will be permanently upset because the rabbits will eat the grass in the system and die of starvation |
B. |
The 'balance' will be restoredby an increase in the wolf population |
C. |
Epidemics will break out in the rabbits and kill all of them |
D. |
Rabbits will starts eating each other |
Answer: Option B
Explanation:
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