Biology
Assertion (A): Plants absorb water from the soil through a semi permeable membrane. The process is termed as osmosis.
Reason (R): The outermost layer of root hair cell is the cell wall which is semi permeable in nature, so it helps in the process of osmosis.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Transport in Plants
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Answer
A is true and R is false.
Explanation — A is true as Water enters the root hair cells from soil by osmosis, which is movement of water through a semi-permeable membrane from higher water concentration (soil) to lower water concentration (cell sap). R is false as the cell wall is freely permeable, not semi-permeable. The cell membrane (plasma membrane) is the actual semi-permeable membrane responsible for osmosis.
Therefore, A is true and R is false is the correct option.
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Related Questions
Assertion (A): The movement of molecules from their lower concentration to a higher concentration requires energy in the form of ATP.
Reason (R): Active transport is the process during which root hairs of a plant absorb minerals from the soil.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Assertion (A): Nitrogen is the main constituent of all proteins which helps in the growth and development of plants.
Reason (R): Nitrogen is micronutrient, which means it is required in very small amounts by the plants. It is absorbed from the soil as a nutrient element or mineral.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Fill in the blanks with suitable terms given below: (fast, leaves, conducting, ascent, humid)
(i) Transportation in plants is carried out by a …………… system.
(ii) The upward movement of sap that contains water and minerals is called …………… of the sap.
(iii) Transpiration is more when the wind is blowing ……………
(iv) Most water gets evaporated from the plant from its ……………
(v) Transpiration is reduced if the air is ……………
Match the terms given in Column A with those given in Column B
Column A Column B (a) Phloem parenchyma (i) Cylindrical cells devoid of a nucleaus (b) Tracheids (ii) Tubular cells forming long channels (c) Xylem vessels (iii) Cells attached to sieve tubes (d) Sieve tubes (iv) Elongated dead cells (e) Companion cells (v) Cells storing food