Geckos and some other animals can climb smooth surfaces. Which of these explanations of this observation do you think is most reasonable?

Question

Revolt · Accepted Answer

The gecko’s feet are rough, which increases the friction with the surface.; The gecko’s feet have tiny suction cups on them that stick to the surface.; The gecko’s feet secrete a sticky substance that helps them adhere to the surface.; The gecko’s feet contain molecules that are attracted to the molecules on the surface.

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