Which one of the following statements can best explain the term critical concentration of an essential element?
1. | essential element concentration below which plant growth is retarded |
2. | essential element concentration below which plant growth becomes enhanced |
3. | essential element concentration below which plant remains in the vegetative phase |
4. | None of the above |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDeficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms?
1. Sulphur
2. Magnesium
3. Nitrogen
4. Potassium
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following symptoms is not due to manganese toxicity in plants?
1. | Calcium translocation in shoot opex is inhibit |
2. | Deficiency in both iron and nitrogen induced |
3. | Appearance of brown spot surrounded by chlorotic veins |
4. | None of the above |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology