Q. No.What percentage of photosynthetic active radiation is captured by plants?
1. 1 – 5 2. 2 – 10 3. 50 4. 90
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Primary carnivores are, most aptly, characterized as:
| 1. | Secondary producers | 2. | Primary consumers |
| 3. | Secondary consumers | 4. | Tertiary consumers |
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In a terrestrial ecosystem, a much larger fraction of energy flows through the:
| 1. | DFC | 2. | GFC |
| 3. | Either of DFC or GFC | 4. | Nither of DFC nor GFC |
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In an aquatic food chain, zooplankton occupy which trophic level?
| 1. | First | 2. | Second |
| 3. | Third | 4. | Fourth |
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Each trophic level has a certain mass of living material at a particular time, best called as:
| 1. | Biomass | 2. | Standing state |
| 3. | Standing crop | 4. | Gross productivity |
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Approximately, what percent of energy is transferred to each trophic level from the lower trophic level in an ecosystem?
| 1. | 1 | 2. | 10 |
| 3. | 50 | 4. | 90 |
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The entire sequence of communities that successively change in a given area are called:
1. Taxa
2. Seres
3. Pioneers
4. Climax
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In which of the following instances would an ecological succession regarded as secondary?
1. Newly cooled lava
2. Bare rock
3. Newly created pond
4. Abandoned farmland
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Ecological succession leads to mesic conditions in:
| I: | Hydrarch succession |
| II: | Xerarch succession |
1. Both I and II
2. Only I
3. Only II
4. Neither I nor II
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The correct sequence of seral stages in primary hydrarch succession [pioneer to climax] would be:
| 1. | Phytoplankton, Submerged plant stage, Submerged free floating plant stage, Reed swamp stage, Marsh-meadow stage, Scrub stage, Forest |
| 2. | Phytoplankton, Submerged free floating plant stage, Submerged plant stage, Reed swamp stage, Marsh-meadow stage, Scrub stage, Forest |
| 3. | Phytoplankton, Submerged plant stage, Submerged free floating plant stage, Marsh-meadow stage, Reed swamp stage, Scrub stage, Forest |
| 4. | Phytoplankton, Reed swamp stage, Marsh-meadow stage, Submerged plant stage, Submerged free floating plant stage, Scrub stage, Forest |
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