Which of the following organisms had a reversal from a bipedal to a quadrupedal mode of locomotion?
a. Salamanders (Caudata)
b. Frogs (Anura)
c. Snakes (Serpentes)
d. Birds (Aves)
e. Crocodylians (Crocodylia)
f. Synapsids/Mammals (Synapsida/Mammalia)
g. You Answered None of the above
