NEET 2007 Biology question

Which one of the following is a matching pair of a body feature and the animal possessing it?

(1)Ventral heart - Scorpion
(2)Post-anal tail - Octopus
(3)Ventral Central nervous system - LeechCorrect
(4)Pharyngeal gill slits absent in embryo - Chamaeleon

Answer: (3)

Solution

Annelids such as leech have a ventral, solid, double nerve cord (ventral central nervous system), so pair (3) is correct. Scorpion (an arthropod) has a dorsal heart, not ventral (1). A

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Question ID VK-089765