An air environment, gravity, and desiccation are three challenges that were addressed in the evolution of reptiles. What three evolutionary innovations addressed these challenges?
a. Gills, bony skeleton, and lungs
b. The amniotic egg, sturdy fins, and a cartilaginous skeleton
c. Dorsal nerve cord, notochord, and a post-anal tail
d. . Better limb support, gills, and pharyngeal slits
e. Lungs, better limb support, and the amniotic egg
Ans: e. Lungs, better limb support, and the amniotic egg
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