Answer:
Gravitropism also known as geotropism is a coordinated process of differential growth by a plant in response to gravity pulling on it. When laid onto its side, the growing parts of the stem begin to display negative gravitropism, this could aslo be a sign of tromism of growing upwards. Tropism is very common and if you see a weird looking tree with even a weird looking stump than even that could be classified as Gravitropism.
