Q. In which of the following animals, respiration occurs without any respiratory organ?
A) Frog
B) Fish
C) Cockroach
D) Earthworm
Explanation
Earthworm respires through general body surface and has no respiratory organs.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.