Q. Which one of the following is an example of cleistogamy?
A) Sunflower
B) Vallisneria
C) Commelina
D) Calotropis
Explanation
In cleistogamy, bisexual flowers never open; therefore, the pollen grains may only pollinate the stigma of the same flower, e.g., Commelina benghalensis.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.