Q. How many hearts are found in earthworm?
A) 8 (four pairs)
B) 2 (one pair)
C) 6 (three pairs)
D) 12 (six pairs)
Explanation
In each of the segments, 7, 9, 12 and 13 of earthworm, a pair of large, thick, rhythmically contractile vertical vessels celled hearts are present, i.e., four pairs of hearts are present.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.