Q. Which one of the following is a matching pair of a body feature and the animal possessing it?
A) Ventral central nervous system - Leech
B) Pharyngeal gill slits absent in embryo - Chamaeleon
C) Ventral heart - Scorpion
D) Post-anal tail - Octopus
Explanation
[Solution from source] Leech is an annelid, and non-chordates such as annelids have a ventral, solid nerve cord. Chamaeleon, being a chordate, does have pharyngeal gill slits in the embryo, scorpion has a dorsal heart, and octopus has no post-anal tail. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.