Traits such as ventrally placed heart, a dorsal aorta,2 pairs of limbs and a pair of mesonephric kidneys
characterise
(1) Reptiles
(2) Pisces
(3) Amphibians
(4) Mammals
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Answer:
Amphibians
Explanation:
Ventrally placed heart is present in all Chordates
2 pairs of limbs are present in Amphibians,Reptiles,Aves and Mammals
Mesonephric kidneys are present only in Amphibians
Dorsal aorta is also present in Amphibians
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