Question

define geotropism? state its two types?

Answer 1

Due to the force of the gravity the parts of the plant grows. This growth is called geotropism. There are two types of geotropism - negative geotroprism and postive geotroprism. Negative geotroprism means the upward growth and the downward growth is termed as postive geotroprism

Answer 2

Geotropism is the response to gravity in which different parts of a plant grow in opposite directions like a root grows downwards whereas the stem grows upwards.
It's two states are :
  (1) POSITIVE GEOTROPISM (growing with gravity)
  (2) NEGATIVE GEOTROPISM (growing against gravity)