Sexual Reproduction In Flowering Plants
A plant breeder wishing to prevent self-pollination removes the anthers from a bisexual flower before the pollen matures and is released.
Select the correct option:
Solution
Emasculation
Artificial hybridization is an important crop-improvement tool outlined in NCERT Class 12, Chapter 2 (Sexual Reproduction in Flowering Plants). When the female parent bears bisexual flowers, the removal of anthers before the anther dehisces is called emasculation, and it ensures that the flower cannot self-pollinate. This guarantees that any seed set results from controlled cross-pollination by the breeder's chosen pollen. Bagging is incorrect because it refers to covering the emasculated flower with a butter-paper bag to prevent contamination by unwanted pollen, a step that follows emasculation rather than replacing it. Hybridization is the overall goal of crossing two selected parents and is too broad to name this specific step. Pollen storage refers to preserving pollen for later use and is unrelated to anther removal. A logical check supports the answer: stopping self-pollination in a bisexual flower demands physical removal of the male parts, which is precisely what emasculation achieves before pollen is shed.
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About This Question
- Subject
- biology
- Chapter
- reproduction
- Topic
- sexual reproduction in flowering plants
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Emasculation
Artificial hybridization is an important crop-improvement tool outlined in NCERT Class 12, Chapter 2 (Sexual Reproduction in Flowering Plants). When the female parent bears bisexual flowers, the removal of anthers before the anther dehisces is called emasculation, and it ensures that the flower cannot self-pollinate. This guarantees that any seed set results from controlled cross-pollination by the breeder's chosen pollen. Bagging is incorrect because it refers to covering the emasculated flower with a butter-paper bag to prevent contamination by unwanted pollen, a step that follows emasculation rather than replacing it. Hybridization is the overall goal of crossing two selected parents and is too broad to name this specific step. Pollen storage refers to preserving pollen for later use and is unrelated to anther removal. A logical check supports the answer: stopping self-pollination in a bisexual flower demands physical removal of the male parts, which is precisely what emasculation achieves before pollen is shed.
This easy difficulty biology question is from the chapter reproduction, covering the topic of sexual reproduction in flowering plants. It appeared in the 2025 exam.
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