_ is necessary for development of leaves and it tends to accumulate in leaves and bark.
Correct answer: D. Nitrogen
- A. NO2
- B. Calcium
- C. Gypsum
- D. Nitrogen
Explanation
d) Nitrogen: This is the correct option. Nitrogen is necessary for the development of leaves and is a critical component of chlorophyll, which is essential for photosynthesis. Nitrogen tends to accumulate in leaves, as it is a major component of proteins and other cellular structures. However, it does not specifically accumulate in bark.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About Plant Nutrition and Transport
Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
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