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Regarding vertebrates : 1. They have a ventral muscular heart with two, three or four chambers. 2. They have kidneys for excretion and osmoregulation 3. They have paired appendages which may be limbs but never fins.

( a ) 2 is correct but 1 and 3 are incorrect
( b ) 3 is incorrect; 1 and 2 are correct
( c ) 1 is incorrect but 2 and 3 are correct
( d ) All are incorrect

1 Answer

(B) is the right answer.

Besides the basic chordate characters, vertebrates have a ventral muscular heart with two, three or four chambers, kidneys for excretion and osmoregulation and paired appendages which may be fins or limbs.
answered Jan 6, 2014 by pady_1
 

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