Discuss harryvan's answer to: Trees grow upwards on a slope - Why ?

I noticed that trees that grow on a slope still grow straight upwards (not vertical to the ground). How do trees "know" to grow straight upwards ?

That force is called gravitropism. That means that the roots and stem or tree trunk grow in the direction of earth's gravitational force.

Liked this answer? Tell your friends about it
Add Your Comment (or add your own answer)