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 |
Which one of the following is not a functional unit of an ecosystem?
1. Energy flow
2. Decomposition
3. Productivity
4. Stratification
The upright pyramid of number is absent in:
1. Pond
2. Forest
3. Lake
4. Grassland
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 |
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