The rate of growth in roots is decreased by one of the following plant hormones. This plant hormone is:

The growth movement of a plant part in response to the touch of an object is called:

The climbing organs of plants like tendrils grow towards any support which they happen to touch and wind around the support. This is an example of:

When the leaves of a Mimosa pudica plant are touched with a finger, they fold up quickly. This is an example of:

Dandelion flowers open the petals in bright light during the daytime but close the petals in dark at night. This response of dandelion flowers to light is called: