D. Most of the energy that drives metabolism is supplied by ATP
No they don't. They never cross each other because of the way that they are drawn, similarly to how height is represented. That's why they never cross.
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Answer:
A frog's pelvis(hip bones) can slide up and down its spine, which may help it jump. The vertebrae at the bottom end of the spine are fused into one bone called the urostyle much like our coccyx(tailbone) - the remains of their tadpole tail.