CBSE Class 11 Biology NCERT Solutions: Chapter 12, Mineral Nutrition
NCERT questions are perfect source for extensive practice and clear understanding of each topic. So to get the right approach to all NCERT questions read here the NCERT solutions provided for Class 11 Science Chapter 12 - Mineral Nutrition.
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Here you will get the NCERT solutions for Class 11 Biology chapter: Mineral Nutrition. All the solutions have been designed in the simplest way so as to help students easily understand the concepts involved.
Some of the questions and their solutions from NCERT Solutions for Class 11: Mineral Nutrition, are as follows:
Q. ‘All elements that are present in a plant need not be essential to its survival’. Comment.
Ans. A nutrient is considered inessential for a plant if it is not involved in the plant’s physiology and metabolism. Hence, they are not essential for the plants to complete their life cycle.
Q. Why is purification of water and nutrient salts so important in studies involving mineral nutrition using hydroponics?
Ans. Hydroponics is the process of growing plants in a nutrient solution without using soil. Since the plant roots are exposed to a limited amount of the solution, so this may cause the reduced concentrations of oxygen and other minerals in the plant roots. Therefore, to maintain an optimum growth of the plant and obtain accurate scientific results, purification of water and nutrient salts is essential for carrying out the process of hydroponics.
Q. Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.
Ans. The five main deficiency symptoms arising in plants along with minerals giving rise to them are described below:
(i) Chlorosis: It is the loss of chlorophyll leading to the yellowing of leaves. It is mainly caused due to the deficiencies of nitrogen, potassium, magnesium, sulphur, iron, manganese, zinc, and molybdenum.
(ii) Necrosis: It is the death of plant tissues, particularly lave tissues. It arises due to the deficiencies of calcium, magnesium, copper, and potassium.
(iii) Inhibition of cell division: It is caused by the deficiencies of nitrogen, potassium, sulphur, and molybdenum.
(iv) Delayed flowering: It is caused by the deficiencies of nitrogen, sulphur, and molybdenum.
(v) Stunted plant growth: It is caused by the deficiencies of copper and sulphur.
Q. If a plant shows a symptom which could develop due to deficiency of more than one nutrient, how would you find out experimentally, the real deficient mineral element?
Ans. In order to identify the real deficient nutrient a plant, first we need to tabulate all the available symptoms in different parts of the plant and then compare them with the available standaid tables.
Get the complete the NCERT solutions for Class 11: Mineral Nutrition, from the following link:
Class 11 Biology NCERT Chapter: Mineral Nutrition
At the time of solving the NCERT questions, if you find yourself puzzled or unaware of any particular concept, then you should go through the NCERT chapter once again. Taking a thorough reading of the theories given in NCERT book will help you understand the problem discussed in a question and then come with an appropriate answer.
Main topics discussed in Class 11 Biology chapter: Mineral Nutrition are:
- Methods to Study the Mineral Requirements of Plants
- Essential Mineral Elements
- Role of Macro- and Micro-nutrients
- Deficiency Symptoms of Essential Elements
- Toxicity of Micronutrients
- Mechanism of Absorption of Elements
- Translocation of Solutes
- Soil as Reservoir of Essential Elements
- Metabolism of Nitrogen
- Nitrogen Cycle
- Biological Nitrogen Fixation.
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