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Q. No.The diagram shows hydroponic plant production. What is true regarding the technique?
I. Tube in which the plants are grown should be straight and not on an incline as shown in the figure.
II. Roots of the plants are continuously bathed in the aerated nutrient solution as shown in the diagram.
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Hydroponics & Aeroponics |
68%
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Assertion: Minerals are absorbed by roots mainly by active process
Reason: Minerals are also absorbed by passive process
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: Minerals are also absorbed by passive process
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Mechanism of Absorption of Elements |
75%
From NCERT
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Assertion: Macronutrients are more important for plants than micronutrients
Reason: Micronutrients are required in large quantities
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: Micronutrients are required in large quantities
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Classification of Nutrients |
53%
From NCERT
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Assertion: The deficiency symptoms appear in plants when the essential nutrients fall below the critical concentration
Reason: At a concentration below the critical value, the growth of plant is reduced
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: At a concentration below the critical value, the growth of plant is reduced
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Criteria for Essentiality of Elements |
76%
From NCERT
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Assertion: Sulphur is the main constituent of many coenzymes, ferredoxin and vitamins
Reason: Sulphur is found in amino acids like cystine, cysteine and methionine
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: Sulphur is found in amino acids like cystine, cysteine and methionine
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Mineral Function |
60%
From NCERT
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Assertion: Necrosis is tissue death
Reason: Necrosis is due to the deficiency of K, Cu, Mg, Ca
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: Necrosis is due to the deficiency of K, Cu, Mg, Ca
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Mineral Deficiency & Toxicity |
54%
From NCERT
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Assertion: The main symptom of manganese toxicity is the appearance of brown spots surrounded by chlorotic veins
Reason: The excess of Mn may induce the deficiencies of Ca, Mg and Fe
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: The excess of Mn may induce the deficiencies of Ca, Mg and Fe
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Mineral Deficiency & Toxicity |
61%
From NCERT
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Assertion: The enzyme nitrogenase is a Mo-Fe protein
Reason: Nitrogenase is found both in Rhizobium and Nostoc
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: Nitrogenase is found both in Rhizobium and Nostoc
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Nodule formation |
71%
From NCERT
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Assertion: Denitrification is carried by Thiobacillus
Reason: Thiobacillus reduces nitrate present in the soil into free \(N_2\)
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: Thiobacillus reduces nitrate present in the soil into free \(N_2\)
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Nitrogen Fixation | Nitrogen Metabolism |
72%
From NCERT
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The given figure shows a stage in development of root nodule in soyabean. What will be true?
I. A shows an infection thread through which the bacterial cells reach the inner cortex.
II. B shows the division of the cortex and the pericycle cells in the formation of root nodules.
I. A shows an infection thread through which the bacterial cells reach the inner cortex.
II. B shows the division of the cortex and the pericycle cells in the formation of root nodules.
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
Subtopic: Nodule formation |
85%
From NCERT
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