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Photoperiodism Video Lecture | Biology Class 11 - NEET

264 videos|514 docs|310 tests

FAQs on Photoperiodism Video Lecture - Biology Class 11 - NEET

1. What is photoperiodism?
Ans. Photoperiodism is a phenomenon in which plants and animals respond to the duration of daily light and dark periods. It influences various physiological and behavioral processes, including flowering, migration, and hibernation.
2. How does photoperiodism affect plant growth?
Ans. Photoperiodism plays a crucial role in regulating plant growth and development. It influences the timing of flowering, seed germination, and dormancy. Plants can be categorized as short-day, long-day, or day-neutral based on their response to photoperiod, determining when they will flower.
3. What are short-day plants and long-day plants?
Ans. Short-day plants require a longer period of darkness than light to initiate flowering. These plants typically flower in the fall or winter when days are shorter, such as chrysanthemums and poinsettias. In contrast, long-day plants require a shorter period of darkness than light to flower and usually bloom during spring or summer, like spinach and lettuce.
4. How does photoperiodism influence animal behavior?
Ans. Photoperiodism affects various aspects of animal behavior. For example, migratory birds use changes in day length to time their annual migrations. Similarly, hibernating animals rely on photoperiod cues to enter and exit hibernation. It also influences the reproductive behaviors and hormone levels in some animals.
5. Can photoperiodism be manipulated for agricultural purposes?
Ans. Yes, photoperiodism can be manipulated for agricultural purposes. By controlling the duration of light exposure, farmers can induce or inhibit flowering in crops, optimize growth patterns, and synchronize certain plant behaviors. This technique is commonly used in greenhouse cultivation and in producing off-season crops.
264 videos|514 docs|310 tests
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