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प्रश्न
Explain briefly the following term with a suitable example:
Archegonium
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उत्तर
- The multicellular flask-shaped female sex organ found in many gymnosperms, bryophytes, and pteridophytes is called the archegonium.
- The female gamete, egg, or oosphere is located at its dialated base, known as the venter.
- The male gametes are able to swim towards the oosphere because the cells in the narrow neck of the archegonium liquefy.
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संबंधित प्रश्न
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.
Explain briefly the following term with a suitable example:
protonema
Explain briefly the following term with a suitable example:
Diplontic
Explain briefly the following term with a suitable example:
Sporophyll
Differentiate between the following:
Liverworts and Moss
Which is NOT a character of bryophytes?
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 ______.
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?
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?
Identify the pair of heterosporous pteridophytes among 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:
