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 |
The upright pyramid of number is absent in:
1. Pond
2. Forest
3. Lake
4. Grassland
Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?
| 1. | Level PC is insects and level SC is small insectivorous birds |
| 2. | Level PP is phytoplanktons in the sea and Whale on top-level TC |
| 3. | Level PP is pipal trees and the level SC is sheep |
| 4. | Level PC is rats and level SC is cats |
| 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 of the following representations shows the pyramid of numbers in a forest ecosystem?
| 1. | A | 2. | B |
| 3. | C | 4. | D |
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
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 |