Snakes,which Lack Limbs,evolved from Vertebrates That Had Legs

Multiple Choice

Snakes,which lack limbs,evolved from vertebrates that had legs.The limbs of snakes disappeared by _______ and the backbones of snakes are a _______.

A) convergent evolution;synapomorphy
B) an evolutionary reversal;synapomorphy
C) convergent evolution;homoplastic trait
D) an evolutionary reversal;homoplastic trait
E) an evolutionary reversal;heteroplastic trait