The bryophyte with most economic importance will be:
1. | peat moss | 2. | liverwort |
3. | hornwort | 4. | Polytrichum |
Assertion (A): | Bryophytes are also called amphibians of the plant kingdom. |
Reason (R): | Bryophytes play an important role in plant succession on bare rocks/soil. |
1. | Both (A) and (R) are True and (R) explains (A) |
2. | Both (A) and (R) are True and (R) does not explain (A) |
3. | (A) is True but (R) is False |
4. | (A) is False but (R) is True |
1. | Pteridophytes | 2. | Gymnosperms |
3. | Monocots | 4. | Bryophytes |
I: | The main plant body is haploid. |
II: | The sex organs are multicellular. |
III: | The sporophyte is not free-living. |
Antheridium of bryophytes produce _______ antherozoids.
1. | Non-motile | 2. | Uni-flagellate |
3. | Biflagellate | 4. | Ciliate |
All the following are characteristics of bryophytes except:
1. spore producing
2. dominant gametophyte
3. lignified tissues
4. producing antheridium and archegonium
I: | The sex organs in bryophytes are multicellular. |
II: | The male sex organ is called antheridium and they produce biflagellate antherozoids. |
III: | The female sex organ called archegonium is flask-shaped and produces a single egg. |
IV: | The antherozoids are released into water where they come in contact with archegonium. |
V: | Zygotes undergo reduction division immediately. |
1. | They are dependent on water for sexual reproduction. |
2. | Archegonium is flask shaped and produces multiple eggs. |
3. | Sporophyte is attached to the photosynthetic gametophytes and derives nourishment from it. |
4. | The antherozoids are released into water. |
I: | Zygotes undergo reduction division immediately. |
II: | The sporophyte is not free-living but attached to the photosynthetic gametophyte and derives nourishment from it. |
Assertion (A): | Peat moss is used as packing material for trans-shipment of living material. |
Reason (R): | Peat moss has a good capacity to hold water. |
1. | (A) is True and (R) is False. |
2. | Both (A) and (R) are True and (R) is a correct explanation of (A). |
3. | Both (A) and (R) are True but (R) is not a correct explanation of (A). |
4. | (A) is False and (R) is True. |