Q. No.| 1. | A population | 2. | A species |
| 3. | A biological community | 4. | An ecosystem |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
| Statement I: | Entire biosphere is regarded as a global ecosystem by many ecologists. |
| Statement II: | The global ecosystem is divided into terrestrial and aquatic ecosystem for convenience. |
| 1. | Only Statement I is correct. |
| 2. | Only Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Energy flow and nutrient cycling are two important components of an ecosystem. What will be true comparison of the two?
| 1. | The amount of energy is much greater than the amount of nutrients |
| 2. | Organisms always need nutrients, but they don't always need energy |
| 3. | Nutrients are recycled, but energy is not |
| 4. | Organisms always need energy, but they don't always need nutrients |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
| 1. | Stratification | 2. | Scarification |
| 3. | Standing crop | 4. | Standing state |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
| Statement I: | There is unidirectional movement of energy towards the higher trophic levels and its dissipation and loss as heat to the environment. |
| Statement II: | Nutrients are never lost from the ecosystems, rather they are recycled time and again indefinitely. |
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Productivity is the rate of production of biomass expressed in terms of :
i.
ii.
iii.
iv.
| 1. | ii | 2. | iii |
| 3. | ii and iv | 4. | i and iii |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
In an ecosystem, the rate of production of organic matter during photosynthesis is called as its:
| 1. | Gross Primary productivity |
| 2. | Net Primary productivity |
| 3. | Secondary productivity |
| 4. | Non productivity |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Net primary productivity is the gross primary productivity minus:
| 1. | that which is consumed by herbivores |
| 2. | that which is consumed by the producer in metabolism |
| 3. | secondary productivity |
| 4. | loss due to mortality |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Secondary productivity in an ecosystem can be defined as:
| 1. | The amount of chemical energy, typically expressed as carbon biomass, that primary producers create in a given length of time. |
| 2. | The rate at which all the autotrophs in an ecosystem produce net useful chemical energy. |
| 3. | The rate of formation of new organic matter by consumers. |
| 4. | The amount of energy released by the action of detritivores and decomposers in an ecosystem. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The annual net primary productivity of whole biosphere is approximately:
| 1. | 25 billion tons | 2. | 55 billion tons |
| 3. | 70 billion tons | 4. | 170 billion tons |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
© 2024 GoodEd Technologies Pvt. Ltd.