function of upper epidermis

Epidermis covers the upper and lower surfaces of the leaf. Usually a single layer of tightly-packed cells, the epidermis mediates exchanges between the plant and its environment, limiting water loss, controlling gas exchange, transmitting sunlight for photosynthesis, and discouraging herbivores.

1. What is the role of the upper epidermis?
2. What is the function of upper and lower epidermis?
3. How is the upper epidermis adapted for its function?
4. What is the function of the lower epidermis?
5. What is the function of epidermis?
6. Why is the upper epidermis transparent?
7. What is the functional difference between upper and lower epidermis?
8. Which epidermis has more stomata?
9. Are stomata present in the upper epidermis?
10. Is Leaf a tissue?
11. What is the function of the cuticle?
12. How are plants adapted for gas exchange?

What is the role of the upper epidermis?

On the top of the leaf, this is known as the upper epidermis. This is a single layer of cells found directly below the cuticle. It helps protect the leaf by aiding in preventing water loss and providing an extra layer between the outside and inside of the leaf.

What is the function of upper and lower epidermis?

The upper epidermis contains a thick cuticle in order to prevent the water loss and provides an extra layer between the outside and inside of the leaf. The lower epidermis contains more stomata than the upper epidermis, facilitating the gas exchange and also helps to prevent water loss.

How is the upper epidermis adapted for its function?

It produces a waxy layer, called the cuticle, which is not made of cells but is a waterproof barrier to prevent excessive evaporation through the hot upper surface of the leaf. The upper epidermis cells have no chloroplasts so light passes through them easily.

What is the function of the lower epidermis?

Lower Epidermis: A protective layer of cells. The lower epidermis produces a waxy cuticle too in some plant species. The lower epidermis contains pores called stomata that allow carbon dioxide and oxygen to move in and out of the plant respectively.

What is the function of epidermis?

The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands.

Why is the upper epidermis transparent?

Epidermis has thick cuticle layer over it which is transparent. It is transparent so that light can reach the inner portions of the leaf. If it was not translarent , less light would reach to the chlorophylls hence reducing the amount of food produced through photosynthesis.

What is the functional difference between upper and lower epidermis?

The main difference between upper epidermis and lower epidermis is that upper epidermis possesses a cuticle layer whereas lower epidermis possesses a large number of stomata.

Which epidermis has more stomata?

Explanation: All surfaces of the leaf have some amount of stomata for regulating gas exchange for photosynthesis. However, the lower epidermis (the underside of the leaf) has more, because it is more often in the shade and so it is cooler, which means evaporation won't take place as much.

Are stomata present in the upper epidermis?

Stomata are present in the sporophyte generation of all land plant groups except liverworts. ... In plants with floating leaves, stomata may be found only on the upper epidermis and submerged leaves may lack stomata entirely. Most tree species have stomata only on the lower leaf surface.

Is Leaf a tissue?

The leaf is a collection of tissues which include: The epidermis which covers the upper and lower surfaces. The mesophyll inside the leaf which is rich in chloroplasts. The veins contains the vascular tissue (where xylem and phloem are present).

What is the function of the cuticle?

The cuticle is well known for its functions as a diffusion barrier limiting water and solute transport across the apoplast and for its protection of the plant against chemical and mechanical damage, as well as pest and pathogen attack (Riederer, 2006).

How are plants adapted for gas exchange?

Leaves have a large surface area, which means more space to allow CO2 to enter. They are thin so there is less for gases to travel. Leaves contain Stomata; these are small holes found distributed throughout the leaf which open and close, allowing gas exchange. Cells are organised in layers within the leaf.