Define geotropism. Give one example of geotropism.

How does phototropism occur in a plant stem (or shoot)? Explain with the help of labelled diagrams.

What is meant by positive phototropism and negative phototropism? Give one example of each type.

What is meant by 'positive geotropism' and 'negative geotropism? Give one example of each type. Draw a labeled diagram to illustrate your answer indicating the plant part which shows positive geotropism and the plant part which shows negative geotropism.

Name one plant part which exhibits positive thigmotropism.