Q. Trichocyst and nematocysts are meant for
A) Defence
B) Nutrition
C) Respiration
D) Excretion
Explanation
For a long time cnidarians and ctenophores were grouped together in the phylum-Coelenterata because these are similar in general appearance, but now, Ctenophora became a new phylum.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.