CSS :: Population Biotic Community
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11. |
The vertical layering of organisms corresponds to: |
A. |
Stratification |
B. |
Dominance |
C. |
Physiognomy |
D. |
Diversity |
Answer: Option A
Explanation:
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12. |
The keystone species are those which exhibit: |
A. |
Low abundance, little influence |
B. |
High abundance, little influence |
C. |
Low abundance, high influence |
D. |
High abundance, high influence |
Answer: Option C
Explanation:
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13. |
The mycorrhizae present in association with higher plant roots are best described as: |
A. |
Keystone species |
B. |
Edge species |
C. |
Critical link species |
D. |
Edaphic pod species |
Answer: Option C
Explanation:
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14. |
The number of individuals of a species per sampling unit is called its: |
A. |
Biomass |
B. |
Abundance |
C. |
Density |
D. |
Frequency |
Answer: Option B
Explanation:
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15. |
The number of sampling units expressed in percentage in which a particular species occurs is called its: |
A. |
Abundance |
B. |
Density |
C. |
Frequency |
D. |
Phenology |
Answer: Option C
Explanation:
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16. |
The earliest settlers on barren lands generally are: |
A. |
Diatoms |
B. |
Ferns |
C. |
Mosses |
D. |
Lichens |
Answer: Option D
Explanation:
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17. |
When the vegetation of any region reaches climatic climax, it is: |
A. |
Lithophytic |
B. |
Xerophytic |
C. |
Mesophytic |
D. |
Hydrophytic |
Answer: Option C
Explanation:
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18. |
The herb stage in a lithosere is immediately followed by plants like: |
A. |
Potantilla |
B. |
Zizyphus |
C. |
Umbilicaria |
D. |
Grimmia |
Answer: Option B
Explanation:
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19. |
The last community in a succession is called: |
A. |
Ecosystem |
B. |
Climatic community |
C. |
Ecotons |
D. |
Seral community |
Answer: Option B
Explanation:
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20. |
Many forested regions of today were once barren rock areas. Mot likely this change involved the following sequence of stages: |
A. |
Lichens-mosses-annual herbs-wood shrubs |
B. |
Annual herb-weedy shrubs-lichens-mosses |
C. |
Woody shrubs-mosses-lichens-annual herbs |
D. |
Mosses-annual herbs-woody shrubs-lichens |
Answer: Option A
Explanation:
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