26 Q 17

Describe how a snake moves by lateral undulation. Why might this form of locomotion be inefficient on an unstable surface (such as sand) or a surface lacking irregularities? What forms of locomotion would work for a snake under these conditions?

Movement by lateral undulation follows an S-shaped pattern, with a snake propelling itself by exerting lateral force against surface irregularities. It is fast and efficient under most circumstances, but not all. It would be inefficient on unstable or immaculate surface because there are no irregularities for it to propel itself from. Rectilinear movement and side-winding would be more efficient in these situations.

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