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Biology Exemplar
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Chapter 1: The Living World
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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
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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
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?
Q2
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.
(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.
Q3
What are essential elements for plants? Give the criteria of essentiality? How are minerals classifieds depending upon the amount in which they are needed by the plants?
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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
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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
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Chapter 19: Excretory Products and their Elimination
44 questions
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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 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.
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Text solution
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(a) Artificial induction in leguminous and non-leguminous plants have been tried by scientists. It’s success rate is very low because gene expression is highly specific phenomenon.
Even if desired gene is introduced, it may not work because conditions for its expressions are very specific.
(b) Symbiotic mutualistic relationship (mutualism) is found between the pine roots and mycorrhiza as both are benefitted mutually.
(c) Yes, microbe has to be in close association, to develop a physical relationship for example Rhizobium gets into the root and involve root tissues, then only helps in nitrogen-fixation.
Even if desired gene is introduced, it may not work because conditions for its expressions are very specific.
(b) Symbiotic mutualistic relationship (mutualism) is found between the pine roots and mycorrhiza as both are benefitted mutually.
(c) Yes, microbe has to be in close association, to develop a physical relationship for example Rhizobium gets into the root and involve root tissues, then only helps in nitrogen-fixation.
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Practice more questions from Biology Exemplar (NCERT Exemplar)
Q1
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?
Q2
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.
(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.
Q3
What are essential elements for plants? Give the criteria of essentiality? How are minerals classifieds depending upon the amount in which they are needed by the plants?
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| Question Text | 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. |
| Updated On | Sep 25, 2022 |
| Topic | Mineral Nutrition |
| Subject | Biology |
| Class | Class 11 |
| Answer Type | Text solution:1 Video solution: 2 |
| Upvotes | 174 |
| Avg. Video Duration | 4 min |
