Short answer type questions
1. What are the functions of xylem and phloem?
2. Define a. Osmosis b. Diffusion.
3. Define absorption of water.
4. What is wilting?
5. Write any two importances of transpiration.
Answers
Answer:
Short answer type questions
1. What are the functions of xylem and phloem?
answer
The main function of the xylem is water transport from roots to the other parts of the plant. Xylem also provides mechanical strength.
phloem:
Its function is the transportation of food and nutrients such as sugar from leaves to other parts of the plant. This movement of substances is called translocation.
2. Define a. Osmosis b. Diffusion.
answer
Osmosis is the movement of solvent from a region of lower solute concentration to a region of higher solute concentration through a semi-permeable membrane.
Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.
3. Define absorption of water.
answer
The process by which plants take-up substances from the soil is known as absorption.
4. What is wilting?
answer
Wilting is the loss of turgidity of leaves and other soft aerial parts causing drooping, folding and rolling
5. Write any two importances of transpiration.
answer
Cools the surface of the leaves.
Helps in growth and development.
It controls the temperature of the plants.
Allows the movement of minerals from the soil to different parts of the plant.
Answer:
1:-xylem is the complex tissue of plants, responsible for transporting water and other nutrients to the plants.
:-phloem is a living tissue, responsible for transporting food and other organic materials.
2:-osmosis can be best defined as the movement of water across a semipermeable membrane from an area of high water concentration to an area of lower water concentration.
:-diffusion is the movement of a substance from an area of high concentration to an area of low concentration.
3:-water absorption is used to determine the amount of water absorbed under specified conditions. factors affecting water absorption include, types of plastic, additives used, temperature and length of exposure.
4:-wilting is the loss of turgidity UP police and other soft aerial parts causing dropping, folding and rolling. wilting is of 3 types.
5:-transpiration helps to plants to maintain an ideal temperature reqd for various biochemical reactions. it is said to be a necessary evil of plants.
Explanation:
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