Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it. Gravity can be either "artificial gravity" or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms.
The way that you will easily deduce which one it is is that you'll see the mouth first instead of the anus because of the different ways of development.
