Q. No.
| 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
Which of the following ecosystem types has the highest annual net primary productivity?
1. Tropical rainforest
2. Tropical deciduous forest
3. Temperate evergreen forest
4. Temperate deciduous forest
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