Question

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

Answer 1

●The growth (or movement) of a plant part in response to the chemical stimulus is known as chemotropism.
●An example of chemotropism is the growth or movement of a pollen tube towards the ovule which is stimulated by the presence of a sugary substance secreted by the stigma of the carpel.
This response of chemotropism is an example of positive chemotropism