sentence: Phototropism is common in plants, but can also occur in other organisms such as fungi.
sentences_after: The cells on the plant that are farthest from the light have a plant growth hormone called auxin, which causes phototropism to occur. It causes the plant to have 'elongated cells' on the farthest side from the light.
concept_name: phototropism
headings: Phototropism
categories: Plant physiology