- 1(current)
Q. No.The correct sequence in primary hydrarch succession in early seral stages would be:
| 1. | Submerged plant – Submerged free-floating plant – Reed swamp – Marsh meadow |
| 2. | Submerged free-floating plant – Submerged plant – Reed swamp – Marsh meadow |
| 3. | Submerged plant – Submerged free-floating plant – Marsh meadow – Reed swamp |
| 4. | Submerged free-floating plant – Reed swamp – Submerged plant – Marsh meadow |
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Which of the following ecosystem characteristics that changes during succession is not correctly matched?
|
|
Characteristics |
Seral stages |
Climax |
|
1. |
Size of individuals |
Small |
Large |
|
2. |
Ecological niches |
Few, generalized |
Many, specialized |
|
3. |
Food chains and webs |
Simple |
Complex |
|
4. |
Efficiency of energy use |
High |
Low |
| Assertion (A): | The plants that are early seral species also tend to be wind-pollinated rather than insect-pollinated. |
| Reason (R): | They are often photosynthetic plants. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
The sequence of communities of primary succession in water is :
| 1. | Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses, and trees. |
| 2. | Phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses, and trees. |
| 3. | Free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses, and trees. |
| 4. | Phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamp, sedges, meadow, and trees. |
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| Assertion (A): | Secondary succession is usually faster than primary succession. |
| Reason (R): | Secondary succession is a process started by an event that reduces an already established ecosystem. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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(current)
Q. No.
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