Identify the type of tropic movement that is responsible for the movement of the pollen tube towards an ovule…

Question

Identify the type of tropic movement that is responsible for the movement of the pollen tube towards an ovule from the following options.

Accepted Answer

## Model Answer **(C) Chemotropism** The growth of the pollen tube towards the ovule is directed by chemical substances, making it an example of chemotropism. Source: Chapter 6, Section 6.2.2 – Movement Due to Growth --- ## Explanation The textbook explicitly states: *"One example of chemotropism is the growth of pollen tubes towards ovules."* Chemotropism is directional growth in response to a chemical stimulus. Students often confuse this with hydrotropism (response to water) or phototropism (response to light). Remember the keyword: **chemical → chemotropism**.

Science — CBSE Class 10 board question