Question

which ability is not important in tiktaalik performing \pushups\?
turn its head independently of its body
hold its fin below the body
bend the fin outward
bend the elbow
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Explanation:

Tiktaalik is a transitional fossil with limb-like fins for support. Performing "pushups" requires fin/limb movement (holding fins below body, bending fins, elbow-like joint bending). Head movement independent of the body is unrelated to the physical support needed for pushups.

Answer:

turn its head independently of its body