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प्रश्न
Differentiate between the following:
Liverworts and Moss
उत्तर
| Liverworts | Moss | |
| 1. | The gametophytic plant body might be foliose or thallose, such in the case of Riccia. | The prostrate, branching filamentous, thalloid protonema and the leafy, erect gametophore are the two distinct forms that make up the gametophytic plant body. |
| 2. | Simple multicellular scales and unicellular rhizoids are seen on the vebtral surface of the thallus. | The multicellular rhizoids have oblique septa dividing them into branches. |
| 3. | The dorsal surface of the thallus contains the sex organs, which grow from superficial cells. | The superficial cells near the tip of the leafy gametophyte give rise to the sex organs. |
| 4. | Elaters are often found in most cases, but not in Riccha. | There are no elaters. |
| 5. | There are no stomata on the capsule's wall. | Sporophyte has stomata for gaseous exchange. |
| 6. | The capsule dehisces unevenly. | Dehiscence is regular |
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संबंधित प्रश्न
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.
Mention the ploidy of the following:
Zygote of a fern
Explain briefly the following term with a suitable example:
protonema
Explain briefly the following term with a suitable example:
Archegonium
Explain briefly the following term with a suitable example:
Diplontic
Explain briefly the following term with a suitable example:
Sporophyll
Which of the following play an important role in plant succession on bare rocks or soil?
Amphibians of the plant kingdom are
A plant shows thallus level of organization. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to which it belongs to ______.
Protonema is ______.
The plant body in higher plants is well differentiated and well developed. Roots are the organs used for the purpose of absorption. What is the equivalent of roots in the less developed lower plants?
In Bryophytes male and female sex organs are called ______ and ______.
Why are bryophytes called the amphibians of the plant kingdom?
Draw labelled diagrams of
- Female and male thallus of a liverwort.
- Gametophyte and sporophyte of Funaria.
- Alternation of generation in Angiosperm.
