Biology
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.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Transport in Plants
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Answer
A is true and R is false.
Explanation — Nitrogen is macronutrient, which means it is required in larger concentration by the plants.
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Related Questions
Assertion (A): Transportation of water in plants from roots to leaves is carried out by the conducting tissue phloem.
Reason (R): Roots absorb water and minerals from the soil which are transported to leaves for various metabolic activities like photosynthesis, transpiration, respiration, etc.
- 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): 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): 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.
- Both A and R are false.
- A is true and R is false.
- A is false and 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 ……………