Question

Define chemotropism. Give one example of chemotropism. State whether this example is of positive chemotropism or negative chemotropism.

Answer 1

Chemotropism

1. The growth of plant parts in response to a chemical stimulus is known as chemotropism.
2. The growth of a pollen tube towards the ovule induced by a sugary stimulus is an example of chemotropism.
3. This is an example of positive chemotropism as the pollen tube grows towards the stimulus.