Q. No.Which of the following would appear as the pioneer organisms on bare rocks?
(1) Liverworts
(2) Mosses
(3) Green algae
(4) Lichens
(1) Liverworts
The amount of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc. present in the soil at any given time, is referred to as the-
1. Nutrient status of a soil
2. Standing state
3. Standing crop
4. Mineral state.
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
| 1. | Liverworts | 2. | Mosses |
| 3. | Green algae | 4. | Lichens |
In which of the following, do both pairs have the correct combination?
| 1. | Gaseous nutrient cycle Sedimentary nutrient cycle |
Carbon and nitrogen Sulphur and phosphorous |
| 2. | Gaseous nutrient cycle Sedimentary nutrient cycle |
Carbon and sulphur Nitrogen and phosphorus |
| 3. | Gaseous nutrient cycle Sedimentary nutrient cycle |
Nitrogen and sulphur Carbon and phosphorous |
| 4. | Gaseous nutrient cycle Sedimentary nutrient cycle |
Sulphur and phosphorous Carbon and nitrogen |
During ecological succession:
| 1. | gradual and predictable change in the composition of species occurs in a given area. |
| 2. | establishment of a new biotic community is very fast in its primary phase. |
| 3. | the number and types of animals are constant. |
| 4. | changes lead to a community that is in equilibrium with the environment and is called a pioneer community. |
The vertical distribution of different species occupying different levels in a biotic community is known as:
2. stratification
3. zonation
4. pyramid
Secondary succession takes place on/in:
2. degraded forest
3. newly created pond
4. newly cooled lava
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
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