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प्रश्न
Explain briefly the following term with a suitable example:
protonema
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उत्तर
It is the first green, filamentous structure that emerges from a moss or fern spore and is typically branching. Mosses produce buds on their protonema, which mature into gametophyte plants. The protonema in the fern develops into the prothallus.
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संबंधित प्रश्न
Mention the ploidy of the following:
Zygote of a fern
Explain briefly the following term with a suitable example:
Archegonium
Explain briefly the following term with a suitable example:
Diplontic
Differentiate between the following:
Liverworts and Moss
Which of the following play an important role in plant succession on bare rocks or soil?
Amphibians of the plant kingdom are
Gemmae are present in ______
Bryophytes that prevent soil erosion by forming dense mats on the soil 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 ______.
In Bryophytes male and female sex organs are called ______ and ______.
The correct sequence of events in the life cycle of bryophytes is:
- Fusion of antherozoid with egg.
- Attachment of gametophyte to substratum.
- Reduction division to produce haploid spores.
- Formation of sporophyte.
- Release of antherozoids into water.
Choose the correct answer from the option given below:
Match List - I with List - II.
| List - I | List - II |
| A. Chlorophyll a | I. Yellow-green |
| B. Chlorophyll b | II. Yellow |
| C. Xanthophylls | III. Blue-green |
| D. Carotenoids | IV. Yellow to Yellow-orange |
Choose the option with all correct matches.
In bryophytes, the gemmae help in which one of the following?
Assertion A: The first stage of gametophyte in the life cycle of moss is protonema stage.
Reason R: Protonema develops directly from spores produced in capsule.
In the light of the above statements, choose the most appropriate answer from the options given below:
