Element responsible pollen grain of plant__________?
Correct answer: B. B
- A. N
- B. B
- C. K
- D. P
Explanation
Boron is especially important for pollen germination and pollen-tube growth, so deficiency often causes poor fertilization and fruit or seed set. Nitrogen, phosphorus, and potassium have broader nutritional roles but are not the specific element indicated here.
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