Lesson eLearning

In the process of pollen tube growth, which hormone acts as a key attractant directing the tube toward the ovule?

hard MCQ 4 marks Class 10 · Science · How do Organisms Reproduce
  1. Auxin
  2. Cytokinin
  3. Gibberellin
  4. Ethylene
Answer
Auxin

The correct answer is Auxin — Therefore, auxin directs the tube toward the ovule.

Step-by-step solution

  1. Pollen tube growth is guided by chemical signals.
  2. Identify auxin as the hormone that attracts pollen tubes to the ovule.
  3. Auxin gradients near the ovule attract the growing pollen tube.
  4. Therefore, auxin directs the tube toward the ovule.
Common mistake: Selecting cytokinin instead of auxin

Concept tested: Hormonal control of pollen tube guidance

Published · How this solution was prepared and checked

← All How do Organisms Reproduce questions