Which of the following is true?
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Vessels are multicellular with a wide lumen. They are generally made up of vessel elements lying one above the other. The wall of vessels is hard but not thick having a wide lumen. Whereas tracheids are unicellular with the narrow lumen.
- Vessels are unicellular and with narrow lumen
- Vessels are multicellular and with wide lumen
- Tracheids are unicellular and with wide lumen
- Tracheids are multicellular and with arrow Lumen
The Correct Option is B
Solution and Explanation
Vessels are multicellular and with wide lumen.
Vessels or the trachea are multicellular are composed of a type of vessel elements that are lying one above the other. The length of the trachea rarely exceeds 10cm, though they may be of a length of two metres as in Quercus and 3−6 metres as in Wistaria and Eucalyptus. The wall of vessels is lignified and hard but not thick, having a wide lumen. On the other hand, tracheids are unicellular with a narrow lumen. The cell cavity or lumen is wide. The thickenings may be annular, spiral, scalariform, reticulate, and pitted.
Hence, the correct answer is option B.
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Concepts Used:
Transpiration
The process by which the plant body releases water in the form of vapors through its aerial portions is known as transpiration. The evaporation of water from the plant portion is also known as transpiration. It is a crucial function in plants that aids other processes and maintains water and nutrient balance. It provides a number of benefits for the plant's body.
Types of Transpiration:
There are three different types of transpiration in plants:
- Stomatal Transpiration: It is the evaporation of water from a plant's stomata. The majority of the water from the plants is lost through transpiration. When the stomata open, the water at the surface of the leaves turns into vapor and evaporates.
- Lenticular Transpiration: Lenticels are tiny openings in the bark of branches and twigs that allow light to pass through. Lenticular transpiration is the process of water evaporating from a plant's lenticels. Lenticels aren't found in every plant. Through lenticels, only a small amount of water is lost.
- Cuticular Transpiration: It is the evaporation of water from a plant's cuticle. The cuticle is a waxy layer that covers the surface of the plant's leaves. Cuticular transpiration loses about 5-10 percent of the water from the leaves. More water is transpired via the cuticles during dry conditions when the stomata are closed.