Biology Exemplar
Class 11
NCERT Exemplar
1
Chapter 1: The Living World
37 questions
2
Chapter 2: Biological Classification
33 questions
3
Chapter 3: Plant Kingdom
28 questions
4
Chapter 4: Animal Kingdom
45 questions
5
Chapter 5: Morphology of Flowering Plants
42 questions
6
Chapter 6: Anatomy of Flowering Plants
52 questions
7
Chapter 7: Structural Organization in Animals
48 questions
8
Chapter 8: Cell: The Unit of Life
39 questions
9
Chapter 9: Biomolecules
31 questions
10
Chapter 10: Cell Cycle and Cell Division
43 questions
11
Chapter 11: Transport in Plants
66 questions
12
Chapter 12: Mineral Nutrition
39 questions
Q1
With the help of examples describe the classification of essential elements based on the function they perform.
Q2
We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ if no, why?
Q3
Trace the events starting from the coming in contact of Rhizobium to a leguminous root till nodule formation. Add a note on importance of leg haemoglobin.
View all question13
Chapter 13: Photosynthesis in Higher Plants
59 questions
14
Chapter 14: Respiration in Plants
42 questions
15
Chapter 15: Plant Growth and Development
48 questions
16
Chapter 16: Digestion and Absorption
34 questions
17
Chapter 17: Breathing and Exchange of Gases
32 questions
18
Chapter 18: Body Fluids and Circulation
42 questions
19
Chapter 19: Excretory Products and their Elimination
44 questions
20
Chapter 20: Locomotion and Movement
39 questions
21
Chapter 21: Neural Control and Coordination
31 questions
22
Chapter 22: Chemical Coordination and Integration
39 questions
Question
Hard
Solving time: 4 mins
We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ if no, why?
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Plants can tolerate a specific amount of micronutrient. A slight lesser amount of it can cause deficiency symptom and a slight higher amount can cause toxicity. The mineral ion concentration which reduces the dry weight of a tissue by is called toxic concentration. This concentration is different for different micronutrients as well as for different plant, e.g., is toxic beyond for soyabean and beyond for sunflower.
It is very difficult to identify the toxicity symptoms of mineral ion. It is because excess uptake of one element can reduces the uptake of other element at a time.
e.g., manganese becomes toxic when absorbed by plants in higher amounts. The toxicity is expressed in form of brown spots surrounded by chlorotic vein.
It is due to the following
(i) Reduction in uptake of and .
(ii) Inhibition of binding of to specific enzymes.
(iii) Inhibition of translocation in shoot apex.
Thus, excess of causes deficiency of iron, magnesium and calcium.
It is very difficult to identify the toxicity symptoms of mineral ion. It is because excess uptake of one element can reduces the uptake of other element at a time.
e.g., manganese becomes toxic when absorbed by plants in higher amounts. The toxicity is expressed in form of brown spots surrounded by chlorotic vein.
It is due to the following
(i) Reduction in uptake of and .
(ii) Inhibition of binding of to specific enzymes.
(iii) Inhibition of translocation in shoot apex.
Thus, excess of causes deficiency of iron, magnesium and calcium.
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Q1
With the help of examples describe the classification of essential elements based on the function they perform.
Q2
We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ if no, why?
Q3
Trace the events starting from the coming in contact of Rhizobium to a leguminous root till nodule formation. Add a note on importance of leg haemoglobin.
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| Question Text | We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ if no, why? |
| Topic | Mineral Nutrition |
| Subject | Biology |
| Class | Class 11 |
| Answer Type | Text solution:1 |
| Upvotes | 56 |
