Which type of tropism does he observe? (a) Geotropism (b) Phototropism (c) Chemotropism (d) Hydrotropism
Correct option is B) Hydrotropism is a plant's growth response in which the direction of growth is determined by a stimulus or gradient in water concentration. Gravitropism (also known as geotropism) is a turning or growth movement by a plant, fungus, or animal in response to gravity. Chemotropism is the growth in response to chemical stimulus from outside of the organism or organisms part. example - growth of pollen tube inside the style Phototropism is the growth of organisms in response to light. It is most often observed in plants, but can also occur in other organisms such as fungi. So, the correct answer is option B.
