46. Plant bends towards the source of light on account of the movement of curvature known as A.geotropism B.thigmotropism C.chemotropism D.phototropism
Answer: Option D Solution: Phototropism is one of the many plant tropisms or movements which respond to external stimuli. Growth towards a light source is called positive phototropism, while growth away from light is called negative phototropism (skototropism).
