- 1(current)
Q. No.Read the following statements about bryophytes :
How many of the above statements are correct?
1. Three
2. Four
3. Five
4. Two
| (i) | Mosses serve as food for birds and herbivores |
| (ii) | Sphagnum, a liverwort, provide peat that have long been used as fuel |
| (iii) | Sphagnum, because of their high capacity to hold water is used as packaging-material for trans-shipment of living plant materials |
| (iv) | Mosses have a little role during ecological succession |
| (v) | Mosses, as they form dense mat, prevent soil erosion |
1. Three
2. Four
3. Five
4. Two
Subtopic: Â Bryophytes |
Level 3: 35%-60%
Hints
Read the following statement with respect to bryophytes:
How many of the above statements are correct?
1. Three
2. Five
3. Four
4. Two
| (i) | Sporophyte is multicellular |
| (ii) | Sporophyte is free living |
| (iii) | The spores germinate to produce sporophyte |
| (iv) | Some cells of sporophyte undergo reduction division to produce haploid spores |
| (v) | Gametophyte is non-photosynthetic structure How many of the above statements are correct? |
1. Three
2. Five
3. Four
4. Two
Subtopic: Â Bryophytes |
 60%
Level 2: 60%+
Hints
Study the diagram given below and mark the correct statement.
1. Part A is dependent on part B.
2. Part B is dependent on part A.
3. Both parts are independent
4. Part A is haploid whereas part B is diploid
Subtopic: Â Bryophytes |
 81%
Level 1: 80%+
Hints
Consider the following statements regarding bryophytes:
I. Bryophytes are also called amphibians of the plant kingdom because they are dependent on water for sexual reproduction.
II. They play an important role in plant succession on bare rocks.
III. They lack true roots, stem or leaves.
IV. The sex organs in bryophytes are multicelluar.
V. The male sex organ produce biflagellate zoospores.
VI. Archegonium is flask-shaped and produces a single egg.
The number of corrected statements is
1. 3
2. 4
3. 5
4. 6
Subtopic: Â Bryophytes |
Level 3: 35%-60%
Hints
Links
| Assertion (A): | The main plant body of the bryophyte is haploid which possesses true roots, leaf-like and stem-like structures. |
| Reason (R): | This main plant body produces gametes and it is known as gametophyte. |
| 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. | (A) is false but (R) is true. |
Subtopic: Â Bryophytes |
 76%
Level 2: 60%+
Hints
| Assertion (A): | Mosses are of great ecological importance. |
| Reason (R): | Mosses are among the first organisms to colonize the rocks. |
| 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. | (A) is false but (R) is true. |
Subtopic: Â Bryophytes |
 76%
Level 2: 60%+
Hints
| Assertion(A): | Species of Sphagnum have good capacity to hold water. |
| Reason(R): | They have been used as packing material for trans-shipment of living material. |
Choices for Assertions and reasons:
| 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. | (A) is false, but (R) is true. |
Subtopic: Â Bryophytes |
Level 3: 35%-60%
Hints
| Assertion(A): | Bryophytes are also called amphibians of the plant kingdom. |
| Reason(R): | These plants can live in soil but are dependent on water for asexual reproduction. |
Choices for Assertions and reasons:
| 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. | (A) is false, but (R) is true. |
Subtopic: Â Bryophytes |
 75%
Level 2: 60%+
Hints
| Assertion(A): | Mosses reduce the impact of falling rain and prevent soil erosion. |
| Reason(R): | Lichens form a dense mat on the soil. |
| 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. | (A) is false, but (R) is true. |
Subtopic: Â Bryophytes |
 56%
Level 3: 35%-60%
Hints
- 1(current)
Q. No.
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