Class 9 > CBSE Class 9 Biology(TISSUES)-Videos & documents by Letstute > Epidermis in Plants - Class 9 - Science
Epidermis in Plants - Class 9 - Science Video Lecture - CBSE Class 9 Biology(TISSUES)-Videos & documents by Letstute
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11 videos|7 docs
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FAQs on Epidermis in Plants - Class 9 - Science Video Lecture - CBSE Class 9 Biology(TISSUES)-Videos & documents by Letstute
| 1. What is the epidermis in plants? |  |
Ans. The epidermis in plants is the outermost layer of cells that covers the entire surface of the plant. It acts as a protective barrier against mechanical injury, water loss, and harmful pathogens.
| 2. What are the functions of the epidermis in plants? | |
Ans. The epidermis in plants has several functions. It helps in reducing water loss by secreting a waxy substance called cuticle. It also protects the plant from external factors such as pests and diseases. Additionally, the epidermis helps in gas exchange and regulates the movement of substances in and out of the plant.
| 3. How does the epidermis adapt to different environments? | |
Ans. The epidermis in plants adapts to different environments in various ways. In hot and dry environments, the epidermis may have a thicker cuticle to reduce water loss. In aquatic plants, the epidermis may have specialized cells called stomata that allow gas exchange. Additionally, some epidermal cells may have hairs or trichomes to provide shade and reduce evaporation.
| 4. What are the different types of cells found in the epidermis? | |
Ans. The epidermis in plants consists of different types of cells. The most common types are pavement cells, which are flat and tightly packed together. Guard cells are specialized cells that surround the stomata and control their opening and closing. Trichomes are hair-like structures found on the epidermis that can be either glandular or non-glandular.
| 5. How does damage to the epidermis affect plant health? | |
Ans. Damage to the epidermis can have negative effects on plant health. If the epidermis is breached, it can lead to increased water loss and susceptibility to diseases. Damage to the cuticle can also make the plant more vulnerable to environmental stresses. Additionally, if the stomata or guard cells are damaged, it can disrupt gas exchange and affect the plant's ability to photosynthesize.
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