Multiple choice

Pollen tube enters through micropyle in:

  1. porogamy

  2. chalazogamy

  3. syngamy

  4. mesogamy

  5. none of these

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A Correct answer
Explanation

Porogamy is the most common type of pollen tube entry where it enters through the micropyle. Chalazogamy enters through chalaza, mesogamy enters through integuments, and syngamy refers to fusion of gametes. Porogamy is the standard route in most flowering plants.