Q. Swollen and spongy petioles are characteristic of
A) Trapa
B) Wolffia
C) Ceratophyllum
D) Limnophila
Explanation
On the basis of floral characters, Roy (1949) proposed the removal of Trapa from Onagraceae and its inclusion in a separate family-Trapaceae. It contains swollen spongy petioles and its root also contains chlorophyll for photosynthesis.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.