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All Physics Chemistry Botany Zoology

Language English हिंदी

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The following statements are correct except

A. Different plants respond differently to the deficiency of the same element B. The deficiency of any element can cause multiple symptoms and that the same symptoms can be caused by the deficiency of other elements as well C. Lack of N, K, S, Mo is responsible for cell division D. There is a narrow range of concentration at which elements are optimum

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Explanation

Page number-199

12.2.3 Deficiency Symptoms of Essential Elements

Mineral Nutrition

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Any mineral ion concentration in tissues that reduces the dry weight of tissues by about 10 per cent is considered

A. Deficient B. Sufficient C. Toxic D. Efficient

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Explanation

Page number-199

12.2.4 Toxicity of Micronutrients

Mineral Nutrition

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The movement of ions is usually called

A. Pressure Flow B. Flux C. Diffusion D. Osmosis

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Explanation

Page number-200

12.3 Mechanism of Absorption

Mineral Nutrition

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Symplast is not associated with

A. Active flux B. Slow C. Uptake of ions through the cell D. Usually has involvement of ion channels or transmembrane proteins which function as selective pore

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Explanation

Page number-200

12.3 Mechanism of Absorption

Mineral Nutrition

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Xylem sap has minerals is substantiated by

A. Heavy isotope of mineral element B. Isobar of mineral element C. Radioisotopes of mineral elements D. Protium labelled isotope of mineral elements

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Explanation

Page number-200

12.4 Translocation of Solutes

Mineral Nutrition

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The soil is enriched of dissolved ions and inorganic salts because of

A. Raining B. Leaching C. Weathering D. Erosion

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Explanation

Page number-200

12.5 Soil As Reservoir Of Essential Elements

Mineral Nutrition

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In nature, ……….. and ……….. provide enough energy to convert Nitrogen to nitrogen oxides (NO, NO₂, N₂O).

A. Lightning, Forest fires B. Industrial combustions, UV radiation C. Forest fire, Lightning D. Lightning, UV radiation

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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Decomposition of organic nitrogen of dead plants and animals into ammonia is called

A. Nitrogen Fixation B. Ammonification C. Nitrification D. Denitrification

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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Which of the type of fixation leads to fixation of atmospheric nitrogen to ammonia?

A. Biological nitrogen fixation B. Industrial nitrogen fixation C. Electrical nitrogen fixation D. Both A and B

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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Electrical nitrogen fixation leads to

A. Formation of Nitrate B. Formation of Nitrite C. Formation of Ammonia D. Formation of Nitrogen

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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