Q. No.Which one of the following is not a functional unit of an ecosystem?
1. Energy flow
2. Decomposition
3. Productivity
4. Stratification
| 1. | It shows the energy content of different trophic-level organisms |
| 2. | It is inverted in shape |
| 3. | It is upright in shape |
| 4. | Its base is broad |
1. mangroves
2. tropical rainforests
3. alpine forests
4. temperate forests
| 1. | Detritus | 2. | Humus |
| 3. | Standing state | 4. | Standing crop |
2. about 50%
3. more than 80%
4. about 70%
The biomass available for consumption by the herbivores and the decomposers is called:
1. net primary productivity
2. secondary productivity
3. standing crop
4. gross primary productivity
Which one of the following is one of the characteristics of a biological community?
| 1. | Stratification | 2. | Natality |
| 3. | Mortality | 4. | Sex-ratio |
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
1. Phytoplankton
2. Fish
3. Zooplankton
4. Frog
1. low moisture content
2. poor nitrogen content
3. anaerobic environment around them
4. low cellulose content
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