IDNLearn.com connects you with a community of experts ready to answer your questions. Our Q&A platform offers reliable and thorough answers to ensure you have the information you need to succeed in any situation.
Answer:
Plants' growth response to gravity is known as gravitropism; the growth response to light is phototropism. ... As a result, root cells on the upper side of the root grow longer, turning the roots downward into soil and away from the light. Roots also will change direction when they encounter a dense object, such as a rock.