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Q. No.
Given below are two statements:
Assertion (A):
Weathering or breakdown of rocks enriches the soil with dissolved ions and inorganic salts.
Reason (R):
Minerals salts are translocated through the xylem along with the descending stream of
water, which is pulled down by transpirational pull.
1.
Both (A) and (R) are true and (R) is the correct explanation of (A).
2.
Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.
(A) is true but (R) is false.
4.
Both (A) and (R) are false.
water, which is pulled down by transpirational pull.
Subtopic: SOIL AS RESERVOIR OF ESSENTIAL ELEMENTS |
53%
From NCERT
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Given below are two statements:
| Assertion (A): | Plants compete with microbes for the nitrogen that is available in the soil. |
| Reason (R): | Nitrogen is a limiting nutrient for both natural and agricultural ecosystems. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Introduction |
66%
From NCERT
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Given below are two statements:
| Assertion (A): | The energy required for the synthesis of ammonia by nitrogenase enzyme is obtained from the respiration of the host cells. |
| Reason (R): | Conversion of atmospheric nitrogen to ammonia eight ATPs for production of one NH3 molecule. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Ammonia Assimilation & Nitrogen Export |
68%
From NCERT
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Which of the following parts of hydroponic plant help in the absorption of minerals and water?
1. Leaves
2. Axillary buds
3. Roots
4. Stem
1. Leaves
2. Axillary buds
3. Roots
4. Stem
Subtopic: Hydroponics & Aeroponics |
82%
From NCERT
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Which of the following plants may not be suited for cultivation on commercial scale by hydroponics?
1. Cucumber
2. Tomato
3. Lettuce
4. Wheat
1. Cucumber
2. Tomato
3. Lettuce
4. Wheat
Subtopic: Hydroponics & Aeroponics |
85%
From NCERT
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If a plant is susceptible to a soil-borne pathogen, then which of the following methods is not apt for its growth?
1. Traditional farming
2. Hydroponics
3. Aeroponics
4. Soil-less culture
1. Traditional farming
2. Hydroponics
3. Aeroponics
4. Soil-less culture
Subtopic: Introduction |
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Subtopic: Classification of Nutrients |
83%
From NCERT
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Some functions of nutrient element are given below:
The concerned nutrient is
1. Cu
2. Fe
3. Ca
4. Mo
| I. | Important constituent of proteins involved in ETS. |
| II. | Activator of catalase. |
| III. | Important constituent of cytochrome. |
| IV. | Essential for chlorophyll synthesis. |
1. Cu
2. Fe
3. Ca
4. Mo
Subtopic: Mineral Function |
76%
From NCERT
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The first stable product of fixation of atmospheric nitrogen in leguminous plants is:
1. NO2
2. ammonia
3. NO3
4. Glutamate
1. NO2
2. ammonia
3. NO3
4. Glutamate
Subtopic: Nitrogen Fixation |
84%
From NCERT
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Subtopic: Classification of Nutrients |
83%
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