Q. No.The deficiency symptoms of iron, magnesium and calcium in plants may actually be due to the toxicity of
1. Potassium
2. Manganese
3. Iron
4. Chlorine
When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are:
1. yellowish leaves
2. colourless petiole
3. dark green leaves
4. shoot apex die.
Deficiency symptoms of nitrogen and potassium are visible first in
1. senescent leaves
2. young leaves
3. roots
4. buds
Which of the following is not involved in water splitting reaction of photosynthesis?
1. Cl-
2. Mn++
3. Cu
4. Both A and C
Critical concentration is the concentration of
1. Any element below which plant growth is retarded but reproduction is not compromised
2. Essential element below which plant growth is retarded
3. Beneficial elements below which plant growth is retarded
4. Beneficial elements above which plant growth is retarded
The element which is present below the critical concentration?
1. Deficient
2. Efficient
3. Beneficent
4. Sufficient
The elements which are actively mobilizable within the plants and exported to young developing tissues. The deficiency is symptom is observed in
1. Both in young and old parts
2. Only in young parts
3. First in old parts
4. First in young parts
The deficiency symptoms of mobilizable substances appear first in Older parts because
1. In order to mobilize the elements to young part, the biomolecules of older parts are broken down
2. In order to mobilize the elements the older part becomes weaker
3. The work of mobilization is random and takes a lot of energy to cause it
4. All of these
The elements which are not actively mobilizable or immobilized within the plants. The deficiency symptom is observed in
1. Both in young and old parts
2. Only in young parts
3. First in old parts
4. First in young parts
The deficiency symptoms of how many elements will be appearing in older tissue first?
N,K,Mg,S,Ca
(1) Zero
(2) Three
(3) Two
(4) Four
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