Q. No.Which one of the following is one of the characteristics of a biological community.
1. Natality
2. Mortality
3. Sex-ratio
4. Stratification
1. Natality
2. Mortality
3. Sex-ratio
4. Stratification
Large Woody Vines are more commonly found in :
1. Temperate forest
2. Mangroves
3. Tropical rainforests
4. Alpine forests
Which one of the following statements is correct for secondary succession?
1. It begins on a bare rock
2. It occurs on a deforested site
3. It follows the primary succession
4. It is similar to primary succession except that it has a relatively fast pace
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Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
1. Its base is broad
2. It shows energy content of different trophic level organisms
3. It is inverted in shape
4.It is upright in shape
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Both, hydrarch and xerarch successions lead to:
1. Medium water conditions
2. Xeric conditions
3. Highly dry conditions
4. Excessive wet conditions
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The breakdown of detritus into smaller particles by earthworm is a process called
1. Humification
2. Fragmentation
3. Mineralisation
4. Catabolism
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Which one of the following is not a gaseous biogeochemical cycle in ecosystem ?
1. Sulphur cycle
2. Phosphorus cycle
3. Nitrogen cycle
4. Carbon cycle
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Identify the possible link "A" in the following food chain :
Plant → insect - frog → "A" → Eagle
1. Rabbit
2. WoIf
3. Cobra
4. Parrot
Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?
| 1. | Level PC is "insects" and level SC is "small insectivorous birds". |
| 2. | Level PP is "phytoplanktons" in sea and "Whale" on top level TC |
| 3. | Level PP is "pipal trees" and level SC is "sheep". |
| 4. | Level PC is "rats" and level SC is "cats". |
Which one of the following is not a functional unit of an ecosystem
1. Energy flow
2. Decomposition
3. Productivity
4. Stratification
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