Read the following statements carefully and select the correct option-
i. Each element can have only one specific structural or functional role in plants.
ii. A lack of any of the elements can manifest certain morphological changes in the plants.
iii. Deficiency symptoms do not go away even after the plant is provided with essential nutrients.

Only ii & iii are correct

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Both i & ii are correct

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Only ii is correct

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Only i is correct

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Solution

The correct option is C Only ii is correct
Each and every element required by plant can have one or multiple structural and functional roles. For example, calcium is required in the synthesis of cell wall, activation of certain enzynmes as well as regulation of metabolic activities.

If the plants are deficient in one or more of the essential elements they manifest deficiencies by exhibiting certain morphological changes like yellowing of leaves, delay in flowering etc. These are called deficiency symptoms. However, these deficiency symptoms usually vanish once the deficient nutrient element is supplied to the plant.

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Similar questions

Which of the following statements is/are true for sexual reproduction in plants?

(i) Plants are obtained from seeds
(ii) Fertilisation can occur only after pollination
(iii) Two plants are always essential
(iv) Only insects are agents of pollination

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. Which of the following statements is correct with respect to the criteria for essentiality of an element?

(I) The element must be absolutely necessary for supporting normal growth and reproduction.

(II) Elements cannot be replaced by another element during its deficiency.

(III) The element must be directly involved in the metabolism of the plant.

(IV) Role of essential elements and their deficiency symptoms can be studied.

(V) The requirement of the element must be specific and not replaceable by another element.

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

Identify the correct statement/s related to deficiency symptoms:

A. These are morphological changes shown by the plants in the absence of a particular element.

B. Absence of all elements develop similar deficiency symptoms.

C. Under continuous deprivation of an element, the plant develops tolerance and deficiency symptoms disappear slowly.

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Deficiency of Nutrients

Standard XII Biology

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