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Q. No.Given below are two statements:
Assertion (A):
In gymnosperms, the male and female gametophytes do not have an independent, free-living existence
Reason (R):
Gametophytes of gymnosperm remain within the sporangia retained on the sporophytes
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.
Subtopic: Gymnosperms |
76%
From NCERT
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Given below are two statements:
| Assertion (A): | Vascular plants are well adapted to the environment and dominate the land |
| Reason (R): | Vascular plants have xylem and phloem for long distance transport |
| 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. |
Subtopic: Pteridophytes |
72%
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Given below are two statements:
| Assertion (A): | Gymnosperms do not produce fruit |
| Reason (R): | Ovules of gymnosperms are enclosed within the ovaries |
| 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. |
Subtopic: Gymnosperms |
71%
From NCERT
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Given below are two statements:
| Assertion (A): | True stem and leaves are absent in bryophytes |
| Reason (R): | In bryophytes, sporophyte is parasitic over 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. | Both (A) and (R) are false. |
Subtopic: Bryophytes |
75%
From NCERT
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Given below are two statements:
| Assertion (A): | The leaves in gymnosperms are well-adapted to withstand extremes of temperature, humidity and wind |
| Reason (R): | Unlike bryophytes and pteridophytes, in gymnosperms, the male and female gametophytes do not have an independent, free-living existence |
| 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. |
Subtopic: Gymnosperms |
81%
From NCERT
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Select the incorrect statement about artificial system of classification of Linnaeus
| 1. | It is called artificial system because it is based on only one or two characters |
| 2. | It was based on androecium structure |
| 3. | It is also called sexual system as he chiefly used characters of stamens |
| 4. | It divides flowering and non-flowering plants into two categories |
Subtopic: Classification System |
From NCERT
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Natural classification system considered natural affinities among organisms which means
1. Natural similarity or resemblance among organisms
2. Natural dissimilarities among organisms
3. Phylogenetic similarities among organisms
4. Phylogenetic dissimilarities among organisms
1. Natural similarity or resemblance among organisms
2. Natural dissimilarities among organisms
3. Phylogenetic similarities among organisms
4. Phylogenetic dissimilarities among organisms
Subtopic: Classification System |
75%
From NCERT
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Subtopic: Algae |
72%
From NCERT
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Select the wrong option about organism shown in the figure
1. It is green filamentous alga
2. It produces flagellated isogametes
3. It has chlorophyll a and b
4. It has cell wall covered by algin
1. It is green filamentous alga
2. It produces flagellated isogametes
3. It has chlorophyll a and b
4. It has cell wall covered by algin
Subtopic: Chlorophyceae: Green Algae |
71%
From NCERT
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All of the algae mentioned in the options are used as food
Select the pair of brown algae which are used as food
Select the pair of brown algae which are used as food
| 1. | Porphyra | Laminaria |
| 2. | Laminaria | Sargassum |
| 3. | Chlorella | Porphyra |
| 4. | Sargassum | Porphyra |
Subtopic: Algae |
79%
From NCERT
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