Question

Opening of flower is an example of

• A. Spontaneous movement
• B. Hyponasty movement
• C. Epinasty movement
• D. Cleistogamous movement

Answer 1

The correct option is C Epinasty movement

The movement which occurs in response to environmental stimuli is known as the nastic movement. This is non- directional movement. It can be caused due to changes in turgor pressure or environmental pressure. Opening and closing of flowers, movement of Euglena, Chlamydomonas towards the source of light are some examples of nastic movement. Epinasty movement can be promoted by ethylene hormone.

So, the correct answer is option C.