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Critical Concentration

Assertion: Pl...

Question

Assertion: Plant exhibits deficiency symptoms
Reason: It receives nutrients below critical concentration

A

Both assertion & reason are correct and the reason is the correct explanation of assertion.

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B

Both assertion & reason are correct but the reason is not the correct explanation of assertion.

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C

Assertion is correct but the reason is incorrect

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D

Both assertion & reason are incorrect

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Solution

The correct option is A Both assertion & reason are correct and the reason is the correct explanation of assertion.
Plants obtain the required mineral salts from the soil. However, the concentration of minerals in the soil may vary and the plants may receive very limited amount of the required mineral salts.

The level of concentration of any essential element below which the plants exhibit deficiency symptoms is considered as critical concentration.

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Similar questions

Q. Assertion: Plant exhibits deficiency symptoms
Reason: It receives nutrients below critical concentration

Q. Assertion :Deficiency symptoms appear when the availability of the essential nutrients falls below the critical concentration Reason: Critical concentration is that limited concentration of the essential element below which growth of the plant is reduced.

Q. Which of the following statements are correct?
(i) The deficiency of any element can cause multiple symptoms
(ii) Same symptoms may be caused by the deficiency of one or several different elements
(iii) The concentration of the essential element below which plant growth is retarded is termed as critical concentration
(iv) Chlorosis is the loss of chlorophyll due to deficiency of N, K, Mg, Fe, S, Mn, Zn, Mo.
(v) Different plants respond differently to the deficiency of the same element.

Q. (a) Moderate decrease or increase of micronutrients causes deficiency and toxicity symptoms respectively.
(b) Excess of manganese causes toxicity of iron, calcium and molybdenum.
(c) A macronutrient is said to be toxic when present below a critical concentration.

Q. Assertion :(A) Every plant can grow can grow in a suiatble mineral solution only (i.e,. without soil) Reason: Hydroponics do not helps in the identification elements anf deficiency symptoms of the plants

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Critical Concentration

Standard XII Biology

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