- 1(current)
Q. No.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 |
Subtopic: Energy Flow | Nutrient Cycling |
73%
Level 2: 60%+
Hints
Given below is a simplified model of phosphorus cycle in an ecosystem. Select the correct statements:
| Statement I: | Rocks are the natural reservoirs where phosphorus is present in the form of phosphates. |
| Statement II: | Minute amounts of phosphates dissolve in soil solution when rocks are weathered and are absorbed by the roots of the plants. |
| Statement III: | Herbivores and other animals obtain phosphorus from plants. |
| Statement IV: | Phosphate solubilising bacteria decompose waste products and dead organisms releasing phosphorus. |
| Statement V: | Gaseous exchange of phosphorus between organisms and environment is significant. |
| 1. | All except Statement V are correct. |
| 2. | All except Statement I and Statement V are correct. |
| 3. | Only Statement I, Statement II and Statement III are correct. |
| 4. | All Statements are correct. |
Subtopic: Nutrient Cycling |
73%
Level 2: 60%+
Hints
- 1(current)
Q. No.
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