How do plants move themselves to face the sun?

Question

Many plants move their leaves/flowers so that they follow the sun across the sky. Also, climbing plants reach out “tentacles” and move around until they find something to grab on to to keep climbing. How do plants do that without muscles or a brain?

In: 199

Answer 1

With climbing plants grabing onto ‘things’, like the pea or the passion fruit vine do, the shoot that garbs onto ‘things’ does so by the rubbing on the ‘things’ slowing the growth on that side of the shoot making it curl around the ‘thing’