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

As to how plant move without a brain: a creeping plant sorta naturally rotates around as it grows, which makes it more likely to eventually hit something. And the rotational motion then continues around the thing it hit to grab on. There’s are some good time lapse videos like this: https://youtu.be/5NvlkEqMtVY