NEET Exam > NEET Videos > Biology Class 11 > Stem and its modifications
Stem and its modifications Video Lecture | Biology Class 11 - NEET
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FAQs on Stem and its modifications Video Lecture - Biology Class 11 - NEET
| 1. What is a sub-aerial stem? |  |
Ans. A sub-aerial stem is a type of stem that grows above the ground but remains partially submerged in water. It is typically found in plants that grow in marshy or swampy areas, where the stem needs to be able to withstand both terrestrial and aquatic conditions.
| 2. How do sub-aerial stems adapt to their environment? | |
Ans. Sub-aerial stems have several adaptations that allow them to survive in their unique environment. They often have a spongy tissue called aerenchyma, which provides buoyancy and allows for the exchange of gases between the plant and the air. They may also have specialized structures, such as lenticels, which are small openings in the stem that facilitate gas exchange.
| 3. What are some examples of plants with sub-aerial stems? | |
Ans. Some examples of plants with sub-aerial stems include mangroves, which have specialized roots and stems that allow them to survive in saltwater environments, and water lilies, which have long, floating stems that enable them to grow in shallow water.
| 4. How do sub-aerial stems differ from underground stems? | |
Ans. Sub-aerial stems grow above the ground but remain partially submerged in water, while underground stems grow beneath the surface of the soil. Underground stems, such as rhizomes or tubers, serve as storage organs for nutrients and water, while sub-aerial stems primarily function to support the plant and facilitate gas exchange.
| 5. Can sub-aerial stems reproduce? | |
Ans. Yes, sub-aerial stems can reproduce. They may produce specialized structures such as adventitious roots or buds, which can give rise to new plants. Some sub-aerial stems, such as those found in water lilies, can also produce flowers and seeds for reproduction.
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Dec 22, 2024 Last updated |
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