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1. Chordates : Gill slits are absent. 2. Non-chordates : Pharynx perforated by gill slits. Regarding 1 and 2:

( a ) 1 is correct but 2 is incorrect
( b ) 1 is incorrect but 2 is correct
( c ) Both are correct
( d ) Both are incorrect

1 Answer

(D) is the right answer.

Chordates : Pharynx perforated by gill slits. Non-chordates : Gill slits are absent.
answered Jan 3, 2014 by pady_1
 
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