Control and Coordination — Science STD 10 — Question

Geotropism is the response of the part of the plant to the gravity stimulus.
Frank introduced the term geotropism for the active force which is liberated by gravity within various parts of the plant.
He also distinguished three types of geotropism- positive, negative and transversal geotropism.
The response of the plant towards the gravity is known as positive geotropism while the response of the plant away from gravity is known as negative geotropism.
Transversal geotropism is a direction of growth that is vertical to the shoot axis such as many lateral shoots and side roots.