In humans, the pelvis and femur, or thigh bone, are involved
in walking. in whales, the pelvis and femur showing figure 16-1
are

answer; 60-100; beats per minute

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i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.