Evolutionarily, the first terrestrial plants to possess vascular tissues are:
1. | Bryophytes | 2. | Pteridophytes |
3. | Gnetales | 4. | Cycads |
Identify the incorrect statement:
1. | As compared to the bryophytes, pteridophytes have sporophyte as the main plant body |
2. | Pteridophyte sporophyte has well differentiated true roots, stem and leaves |
3. | Selaginella has macrophylls like ferns |
4. | In sporophyte of ferns, leaf-like appendages called sporophylls subtend sporangia |
I: | the main plant body is a gametophyte |
II: | body is differentiated into true root, stem and leaves |
III: | organs possess well-differentiated vascular tissues |
A prothallus is
1. | A structure in pteridophytes formed before the thallus develops |
2. | A sporophytic free living structure formed in pteridophytes |
3. | A gametophyte free living structure formed in pteridophytes |
4. | A primitive structure formed after fertilization in pteriodophytes |
Consider the following two statements:
I: | The spread of living pteridophytes is restricted to narrow geographical regions |
II: | They are the first terrestrial plants to possess vascular tissues |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. I is false but II is true
Assertion (A): | The spread of living pteridophytes is limited and restricted to narrow geographical regions. |
Reason (R): | Evolutionarily, pteridophytes are the first terrestrial plants to possess vascular tissues – xylem and phloem. |
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. |
1. | Red algae | 2. | Bryophytes |
3. | Pteridophytes | 4. | Gymnosperms |
I: | transfer of male gamete to the female gamete does not require water |
II: | all the spores are of similar kinds |
Assertion (A): | Ferns exhibit an alternation of generations where the gametophyte is dominant. |
Reason (R): | In ferns, the gametophyte is independent and photosynthetic but smaller and less complex than the sporophyte. |
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. |