Q. No.What type of ecological pyramid would be obtained with the following data?
Secondary consumer: 120 g
Primary consumer: 60 g
Primary producer: 10 g
1. Inverted pyramid of biomass
2. Pyramid of energy
3. Upright pyramid of numbers
4. Upright pyramid of biomass
Which ecosystem has the maximum biomass?
1. Grassland ecosystem
2. Pond ecosystem
3. Lake ecosystem
4. Forest ecosystem
2. The absence of weeds
3. Ecological succession
4. The absence of soil organisms
Most animals that are in deep oceanic water are?
1. Primary consumers
2. Secondary consumers
3. Tertiary consumers
4. Detritivores
The vertical distribution of different species occupying different levels in a biotic community is known as:
2. stratification
3. zonation
4. pyramid
The mass of living material at a tropic level at a particular time is called:
2. standing state
3. net primary productivity
4. standing crop
In an ecosystem, the rate of production of organic matter during photosynthesis is termed as:
1. net primary productivity
2. gross primary productivity
3. secondary productivity
4. net productivity
If 20 J of energy is trapped at the producer level, then how much energy will be available to peacocks as food in the following chain?
Plant → mice → snake → peacock
| 1. | 0.02 J | 2. | 0.002 J |
| 3. | 0.2 J | 4. | 0.0002 J |
Which one of the following processes during decomposition is correctly described?
| 1. | Humanification-Leads to the accumulation of a dark-coloured substance in humans which undergoes microbial action at a very fast rate |
| 2. | Catabolism-Last step decomposition under fully anaerobic condition |
| 3. | Leaching-Water soluble inorganic nutrients rise to the top layers of the soil |
| 4. | Fragmentation-Carried out by organisms such as earthworms |
Secondary productivity is the rate of formation of new organic matter by:
1. Parasite
2. Consumer
3. Decomposer
4. Producer
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