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Biology Exemplar
Class 11
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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
How are organisms like Pseudomonas and Thiobacillus of great significance in nitrogen cycle?
Q2
It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves.
(a) Does it indicate that the element is actively mobilised or relatively immobile?
(b) Name two elements which are highly mobile and two which are relatively immobile.
(c) How is the aspect of mobility of elements important to horticulture and agriculture?
(a) Does it indicate that the element is actively mobilised or relatively immobile?
(b) Name two elements which are highly mobile and two which are relatively immobile.
(c) How is the aspect of mobility of elements important to horticulture and agriculture?
Q3
We find that Rhizobium forms nodules on the roots of leguminous plants. Also Frankia another microbe forms nitrogen fixing nodules on the roots of non-leguminous plant Alnus. (a) Can we artificially induce the property of nitrogen-fixation in a plant, leguminous or non-leguminous?
(b) What kind of relationship is observed between mycorrhiza and pine trees?
(c) Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.
View all question(b) What kind of relationship is observed between mycorrhiza and pine trees?
(c) Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.
13
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
It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves.
(a) Does it indicate that the element is actively mobilised or relatively immobile?
(b) Name two elements which are highly mobile and two which are relatively immobile.
(c) How is the aspect of mobility of elements important to horticulture and agriculture?
Views: 5,507 students
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Text solution
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(a) The plants try to supply more nutrients to its younger leaves than the older leaves. When nutrients are mobile, the deficiency symptoms are shown by the older leaves first because that particular nutrient reaches the top first and lower leaves does not get that nutrient.
(b) Highly mobile elements are and . Less mobile elements are and .
(c) The aspect of mobility of essential elements is important in horticulture and agriculture in the following ways
(i) A crop in which older leaves are harvested if show deficiency symptoms, will decrease its economic value.
(ii) The crops in which flowers, fruits and inflorescence are harvested, the immobile nutrients will not reach to the apex/tip because of immobility, so this will reduce the yield.
(b) Highly mobile elements are and . Less mobile elements are and .
(c) The aspect of mobility of essential elements is important in horticulture and agriculture in the following ways
(i) A crop in which older leaves are harvested if show deficiency symptoms, will decrease its economic value.
(ii) The crops in which flowers, fruits and inflorescence are harvested, the immobile nutrients will not reach to the apex/tip because of immobility, so this will reduce the yield.
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Practice more questions from Biology Exemplar (NCERT Exemplar)
Q1
How are organisms like Pseudomonas and Thiobacillus of great significance in nitrogen cycle?
Q2
It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves.
(a) Does it indicate that the element is actively mobilised or relatively immobile?
(b) Name two elements which are highly mobile and two which are relatively immobile.
(c) How is the aspect of mobility of elements important to horticulture and agriculture?
(a) Does it indicate that the element is actively mobilised or relatively immobile?
(b) Name two elements which are highly mobile and two which are relatively immobile.
(c) How is the aspect of mobility of elements important to horticulture and agriculture?
Q3
We find that Rhizobium forms nodules on the roots of leguminous plants. Also Frankia another microbe forms nitrogen fixing nodules on the roots of non-leguminous plant Alnus. (a) Can we artificially induce the property of nitrogen-fixation in a plant, leguminous or non-leguminous?
(b) What kind of relationship is observed between mycorrhiza and pine trees?
(c) Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.
View all(b) What kind of relationship is observed between mycorrhiza and pine trees?
(c) Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.
Practice questions from Biology Exemplar (NCERT Exemplar)
Question 1
Hard
Views: 5,284
(b) What kind of relationship is observed between mycorrhiza and pine trees?
(c) Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.
Question 2
Hard
Views: 6,507
Question 3
Easy
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Question 4
Easy
Views: 6,585
Practice more questions from Mineral Nutrition
Question 2
Easy
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| Question Text | It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves. (a) Does it indicate that the element is actively mobilised or relatively immobile? (b) Name two elements which are highly mobile and two which are relatively immobile. (c) How is the aspect of mobility of elements important to horticulture and agriculture? |
| Topic | Mineral Nutrition |
| Subject | Biology |
| Class | Class 11 |
| Answer Type | Text solution:1 |
| Upvotes | 146 |
