1. | Saprophytes are not given any place in ecological pyramids |
2. | It assumes a simple food chain that, almost, never exists in nature |
3. | It accommodates a food web |
4. | It does not take into account the same species belonging to two or more trophic levels |
Given below are two statements:
Statement I: | Pyramid of energy is always upright and is the most efficient. |
Statement II: | Pyramid of biomass in sea is generally inverted. |
In the light of the above statements, choose the most appropriate answer from the options given below:
1. Statement I is correct but Statement II is incorrect.
2. Statement I is incorrect but Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
Which of the following statements is not correct?
1. | Pyramid of energy is always upright. |
2. | Pyramid of numbers in a grassland ecosystem is upright. |
3. | Pyramid of biomass in sea is generally inverted. |
4. | Pyramid of biomass in sea is generally upright. |
Which of the following statements is incorrect?
1. | Biomass decreases from first to fourth trophic level. |
2. | Energy content gradually increases from first to fourth trophic level. |
3. | Number of individuals decreases from first trophic level to fourth trophic level. |
4. | Energy content gradually decreases from first to fourth trophic level. |
Which of the following ecological pyramids is generally inverted?
1. | Pyramid of biomass in a sea |
2. | Pyramid of numbers in grassland |
3. | Pyramid of energy |
4. | Pyramid of biomass in a forest |
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
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 |
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. | Detritus | 2. | Humus |
3. | Standing state | 4. | Standing crop |
Which one of the following is not used for the construction of ecological pyramids?
1. | Dry weight | 2. | Number of individuals |
3. | Rate of energy | 4. | Fresh weight |