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Growth of the pollen tube towards the ovule is an example of what?

Answer and explanation

Correct answer: Chemotropism

The governing concept is chemotropism, a directional growth response to chemical substances. The pollen tube grows toward the ovule because chemical signals released by tissues around the ovule guide its direction. This movement is important for delivering the male gamete to the female gametophyte before fertilisation. Therefore, option A is correct. Phototropism responds to light, geotropism to gravity, and hydrotropism to water, so none of those describes the main stimulus here.

Related tags

ChemotropismPollen TubePlant ReproductionControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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