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प्रश्न
List out the functions of the tapetum.
उत्तर
- It supplies nutrition to the developing microspores.
- It contributes sporopollenin through ubisch bodies thus plays an important role in pollen wall formation.
- The pollenkitt material is contributed by tapetal cells and is later transferred to the pollen surface.
- Exine proteins responsible for the ‘rejection reaction’ of the stigma are present in the cavities of the exine. These proteins are derived from tapetal cells.
संबंधित प्रश्न
Sketch and label V. S. of mature anatropous ovule.
Arrange the layers of another wall from locus to periphery
Choose the correct statement(s) about tenuinucellate ovule
Differentiate Secretary and invasive tapetum.
List any two strategy adopted by bisexual flowers to prevent self-pollination.
What is endothelium?
Distinguish tenuinucellate and crassinucellate ovules.
Discuss the steps involved in Microsporogenesis.
With a suitable diagram explain the structure of an ovule.
Identify the event in a botanical garden that is never directly influenced by light.
Identify the function/s of integuments.
Match the Column I (Type of pollination) and Column II (Characteristics). Select the correct option.
| Column I | Column II | ||
| a. | Ornithophily | 1. | Nocturnal flower |
| b. | Entomoohily | 2. | Light pollens |
| c. | Chiropterophily | 3. | Funnel-shaped corolla |
| d. | Anemophily | 4. | Pleasant fragrance and nectar |
Identify the botanical name of garden pea.
From the following which is NOT true about self-pollination?
Flowering in pineapple is promoted by:
During the formation of leaves and elongation of stem, some cells ‘left behind’ from the shoot apical meristem, constitute the:
