NEET BIOLOGY

Detailed explanation-1: -They move in the direction of gravity. Roots grow downwards and exhibit positive geotropism . Whereas shoots grow upwards and exhibit negative geotropism.

Detailed explanation-2: -Plants grow towards or away from the light, the type of tropism in the response to light is called phototropism. In general, the stems usually show positive phototropism, while roots show negative phototropism.

Detailed explanation-3: -Tropic movement is the movement of the plant in response to the stimulus present in the environment, this movement is in response to root and shoot growth. They are mainly of five types: Phototropism-It is the movement of a plant in response to light, they will grow towards the direction of the light.

Detailed explanation-4: -Final Answer: The directional movement of plants in response to contact is thigmotropism.

Detailed explanation-5: -Tropic movement in plants is the directional response to the presence of external stimuli. Such movements usually occur in the presence of external factors like – light, temperature, gravity, water, etc. 2.