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A pollen tube grows towards an ovule. This directional growth is an example of:
AChemotropism
BPhototropism
CGeotropism
DHydrotropism
Answer & Solution
Correct answer: A. Chemotropism
1. The word chemo refers to chemicals.
2. The pollen tube follows a chemical signal.
3. So it is chemotropism.
_Source: syllabus Science Class X, Chapter 7, Control and Coordination._
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