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NCERT Solutions for Class 11 Biology Chapter 12 Mineral Nutrition

by aglasem
August 25, 2021
in 11th Class
Reading Time: 1 min read
0
NCERT Solutions

NCERT Solutions Class 11 Biology Chapter 12 Mineral Nutrition – Here are all the NCERT solutions for Class 11 Biology Chapter 12. This solution contains questions, answers, images, explanations of the complete chapter 12 titled Mineral Nutrition of Biology taught in Class 11. If you are a student of Class 11 who are using NCERT Textbook to study Biology, then you must come across chapter 12 Mineral Nutrition. After you have studied the lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 11 Biology Chapter 12 Mineral Nutrition in one place.

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NCERT Solutions Class 11 Biology Chapter 12 MINERAL NUTRITION

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Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Biology for Class 11 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.

For a better understanding of this chapter, you should also see summary of Chapter 12 MINERAL NUTRITION , Biology, Class 11.

Class 11
Subject Biology
Book Biology
Chapter Number 12
Chapter Name

MINERAL NUTRITION

NCERT Solutions Class 11 Biology chapter 12 MINERAL NUTRITION

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Class 11, Biology chapter 12, MINERAL NUTRITION solutions are given below in PDF format. You can view them online or download PDF file for future use.

MINERAL NUTRITION Download

NCERT Solutions for Class 11 Biology Chapter 12 Mineral Nutrition Download

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Question & Answer

Q.1: ‘All elements that are present in a plant need not be essential to its survival’. Comment.

Ans : Plants tend to absorb different kinds of nutrients from soil. However, a nutrient is inessential for a plant if it is not involved in the plant's physiology and metabolism. For example, plants growing near radioactive sites tend to accumulate radioactive metals. Similarly, gold and selenium get accumulated in plants growing near mining sites. However, this does not mean that radioactive metals, gold, or selenium are essential nutrients for the survival of these plants.

Q.2: Why is purification of water and nutrient salts so important in studies involving mineral nutrition using hydroponics?

Ans : Hydroponics is the art of growing plants in a nutrient solution in the absence of soil. Since the plant roots are exposed to a limited amount of the solution, there are chances that the concentrations of oxygen and other minerals in the plant roots would reduce. Therefore, in studies involving mineral nutrition using hydroponics, purification of water and nutrient salts is essential so as to maintain an optimum growth of the plants.

Q.3: Explain with examples: macronutrients, micronutrients, beneficial nutrients, toxic elements and essential elements.

Ans : Macronutrients: They are the nutrients required by Plants in large amounts. They are present in plant tissues in amounts more than 10 m mole/kg Of dry matter. Examples include hydrogen, oxygen, and nitrogen. Micronutrients: They are also called trace elements and are present in plant bodies in very small amounts, i.e., amounts less than 10 m mole/kg of dry matter. Examples include cobalt, manganese, Zinc, etc. Beneficial nutrients: They are plant nutrients that may not be essential, but are beneficial to plants. Sodium, silicon, cobalt and selenium are beneficial to higher plants. Toxic elements: Micronutrients are required by Plants in small quantities. An excess Of these nutrients may induce toxicity in Plants. For example, when manganese iS present in large amounts, it induces deficiencies of iron, magnesium, and calcium by interfering with their metabolism. Essential elements: These elements are absolutely necessary' for plant growth and reproduction. The requirement Of these elements is specific and non-replaceable. They are further classified as macro and micro-nutrients.

Q.4: 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 are:

  • Chlorosis
  • Necrosis
  • Inhibition of cell division
  • Delayed flowering
  • Stunted plant growth
Chlorosis or loss of chlorophyll leads to the yellowing of leaves. It is caused by the deficiencies of nitrogen, potassium, magnesium, sulphur, iron, manganese, zinc, and molybdenum. Necrosis is the death of plant tissues as a result of the deficiencies of calcium, magnesium, copper, and potassium. Inhibition of cell division is caused by the deficiencies of nitrogen, potassium, sulphur, and molybdenum. Delayed flowering is caused by the deficiencies of nitrogen, sulphur, and molybdenum. Stunted plant growth is a result of the deficiencies of copper and sulphur.

Q.5: 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 plants, the deficiency of a nutrient can cause multiple symptoms. For example, the deficiency of nitrogen causes chlorosis and delayed flowering. In a similar way, the deficiency of a nutrient can cause the same symptom as that caused by the deficiency of another nutrient. For example, necrosis is caused by the deficiency of calcium, magnesium, copper, and potassium. Another point to be considered is that different plants respond in different ways to the deficiency of the same nutrient. Hence, to identify the nutrient deficient in a plant, all the symptoms developed in its different parts must be studied and compared with the available standard tables.

NCERT / CBSE Book for Class 11 Biology

You can download the NCERT Book for Class 11 Biology in PDF format for free. Otherwise you can also buy it easily online.

  • Click here for NCERT Book for Class 11 Biology
  • Click here to buy NCERT Book for Class 11 Biology

All NCERT Solutions Class 11

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All NCERT Solutions

You can also check out NCERT Solutions of other classes here. Click on the class number below to go to relevant NCERT Solutions of Class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.

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