Subjective Type Questions D. Answer the following questions in short, 1 What are vascular tissues? Name the two types of vascular tissues present in plants 2. What are the different elements of xylem? State the functions of xylem in plants. 3. Name the process which causes water to be pulled upwards through xylem vessels from the roots to the leaves. How does the movement of water in a plant differ from the movement of food in it? Does transpiration serve any useful function in the plants? Explain. 5. What are stomata? Give two functions of stomata.
Answers
1: Vascular tissue is a complex conducting tissue, formed of more than one cell type, found in vascular plants. The primary components of vascular tissue are the xylem and phloem. These two tissues transport fluid and nutrients internally. Vascular tissue is made of two specialized conducting tissues: xylem and phloem. Xylem tissue transports water and nutrients from the roots to different parts of the plant, and also plays a role in structural support in the stem.
2: Xylem is a plant tissue used to transport water from roots to other plant parts. 1)tracheids :- Provide mechanical support. 2)tracheae :- Helps in transporting water and dissolved minerals. 3)xylem parenchyma:- Stores food and transports water and minerals
3:Overview and Objectives Overview: Transpiration is the loss of water from a plant in the form of water vapor. Water is absorbed by roots from the soil and transported as a liquid to the leaves via xylem. In the leaves, small pores allow water to escape as a vapor
5: The two functions of stomata are: (i) Transpiration is possible through stomata, i.e., excess water loss from the plant. (ii) Absorption of water from the roots, when there is loss of water from the stomata creates an upward pull. (iii) Exchange of gases