Deficiency of Nutrients

Q.

Which one of the following statements can best explain the term critical concentration of an essential element?

1. None of the above.

2. Essential element concentration below which the plant remains in the vegetative phase.

3. Essential element concentration below which plant growth becomes stunted.

4. Essential element concentration below which plant growth is retarded

Q.

Which of the following are not matched correctly:

1. potassium-macronutrient and involved in operation of stomata

2. nitrogen-macronutrient and component of amino acids

3. phosphorus-macronutrient and component of phospholipids

4. chlorine-micronutrient and is a major component of organic molecules

Q.

If a plant shows a symptom which could develop due to deficiency of more than one nutrient, how would you find out experimentally, the real deficient mineral element?

Q. 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.

1. Only ii & iii are correct
2. Both i & ii are correct
3. Only ii is correct
4. Only i is correct

Q.

Plasticity in plant growth means that

1. None of the above.

2. Stems can extend.

3. Plant growth is dependent on the environment.

4. Plant roots are extensible.

Q.

Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.

Q.

The elements involved in delay of flowering if their concentration is low are

1. N, S, P

2. N, S, Mn

3. N, S, Mo

4. N, S, K

Q. A gardener was working in his field. He noticed that some of his plants have yellow leaves which he has never seen before. He called his friend who was an agricultural scientist. The scientist asked him to send the soil sample to his lab. After a few days, he got the following results:

1. The soil was deficient in Mg, Cu, Ca, K
2. The soil was deficient in N, K, S, Mo
3. The soil was deficient in Mn, Mg, Fe, Zn, Mo, N, K, S
4. The soil was deficient in N, Mg, Ca, K, Mo, Se, B, Cl

Q. Farmers in particular region were concerned that premature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

1. Application of iron and magnesium to promote synthesis of chlorophyll and treatment of the plants with nitrogen
2. Frequent irrigation of the crop
3. Application of boron and calcium
4. Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5- trichlorophenoxy acetic acid

Q.

Match the following deficiency symptoms with relevant essential elements:

$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ A.\text{Chlorosis}& 1.\text{N, S, Mo}\\ B.\text{Necrosis}& 2.\text{N, K, S, Mo}\\ C.\text{Inhibition of cell division}& 3.\text{Ca, Mg, Cu}\\ D.\text{Delay of flowering}& 4.\text{N, K, Mg, S, Fe, Mn, Zn, Mo}\end{array}$

1. A - 1, B - 2, C - 3, D - 4

2. A - 4, B - 3, C - 1, D - 2

3. A - 3, B - 4, C - 1, D - 2

4. A - 4, B - 3, C - 2, D - 1

Q. Is the colgi complex a single membrane bounded structure in eukaryotic cells??

Q.

Why is that in certain plants deficiency symptoms appear first in younger parts of the plant while in others they do so in mature organs?

Q. If a plant shows a symptom which could develop due to deficiency of more than one nutrient, how would you find out experimentally, the real deficient mineral element?

Q.

Identify the mismatch from the following.

1. Chlorosis - loss of chlorophyll; Necrosis - death of tissue

2. Necrosis - death of tissue

3. Chlorosis - Yellowing of leaves

4. Necrosis - Stunted growth

Q.

Study the following statements and identify the concerned essential element.

A. It is recently recognized 17th essential element

B. It is as activator of Urease enzyme

C. It induces disease resistance in some plants

D. Its deficiency causes mouse ear in pecan

1. Cl

2. Na

3. Ni

4. Mo

Q.

If the older leaves of a plant shows yellowing and the yield is reduced, then it may be due to the deficiency of:

1. Phosphorus

2. Potassium

3. Nitrogen

4. Magnesium

Q. Which of the following elements’ deficiency can lead to premature falling off of leaves and buds in young plants?

1. Mg
2. Cu
3. P
4. All of the above

Q. Deficiency diseases occur in human and not in plants.

1. True
2. False