1. Only I | 2. Only II |
3. Both I and II | 4. Neither I nor II |
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1. | Funaria | 2. | Marchantia |
3. | Polytrichum | 4. | Sphagnum |
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I: | Protonema is a gametophyte stage that is creeping, green, branched and frequently filamentous. |
II: | Leafy stage bears sex organs and is attached to the soil through multicellular and branched rhizoids. |
III: | Sex organs are produced at the apex of the leafy shoot. |
IV: | They have an elaborate mechanism of spore dispersal. |
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Consider the given statements regarding certain pteridophytes:
Statement I: In Selaginella and Equisetum, sporophylls may form distinct compact structures called strobili or cones.
Statement II: Selaginella and Salvinia are heterosporous.
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Statement I and Statement II are correct
4. Statement I and Statement II are incorrect
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): | Heterospory in some pteridophytes paved the way for the evolution of seeds in higher plants. |
Reason (R): | The megaspores and microspores in heterosporous ferns give rise to female and male gametophytes respectively. |
In the light of the above statements choose the correct 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. | (A) is False but (R) is True. |
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Statement I: | In Cycas, the pinnate leaves persist for a few years. |
Statement II: | In conifers, the needle-like leaves reduce the surface area helping to reduce water loss. |
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I. | Sporophytic generation is represented only by the one-celled zygote. |
II. | Meiosis in zygote results in the formation of haploid gametes. |
III. | The dominant photosynthetic stage is the free living gametophyte |
1. | Only I is correct |
2. | Only I and III are correct |
3. | Only II is correct |
4. | I, II and III are correct |
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1. | Red algae | 2. | Bryophytes |
3. | Pteridophytes | 4. | Gymnosperms |
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