Question:
Generative cell was destroyed by laser but a normal pollen tube was still formed because
Generative cell was destroyed by laser but a normal pollen tube was still formed because
Updated On: Jul 11, 2024
- vegetative cell is not damaged.
- contents of killed generative cell stimulate pollen growth
- laser beam stimulates growth of pollen tube
- the region of emergence of pollen tube is not harmed.
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The Correct Option is A
Solution and Explanation
Generative cell was destroyed by laser but a normal pollen tube was still formed because vegetative cell is not damaged. Each microspore divide by mitotic division making a smaller generative cell and a larger vegetative cell or tube cell. If generative cell is damaged then the normal pollen tube will be formed because pollen tube is formed by vegetative cell not by generative cell of microspore.
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Concepts Used:
Sexual Reproduction in Flowering Plants
Sexual reproduction in flowering plants takes place or happens when the production of a new organism occurs from two parents by making use of their gametes or sex cells. Both sexual and asexual reproduction can be found in plants. Nearly all flowering plants reproduce sexually. Flowers play a captious role in the process as it carries both the male and female reproductive parts commonly known as androecium and gynoecium respectively.
An individual flower comprises the following parts -
- Pedicle
- Calyx
- Petals
- Sepals
- Stamen
- Pistil
- Receptacle