Question

Plants respond to various sources of stimuli such as sunlight, water, and gravity. Plants in humid climates sometimes bend their roots toward a higher humidity. What is this response known as? A. geotropism B. gravitropism C. hydrotropism

Answer 1

The answer for the question is hydrotropism. Tropism is the directional growth of an organism, typically a plant, in response to an external stimulus, such as light or gravity. Growth towards the stimulus is called the positive tropism, while the growth away from the stimulus is referred to as negative tropism. In this case; hydrotropism is a type of tropism where plants bend their roots towards the source of stimuli, that is water or moisture. The importance of this tropism is to seek more water for use by the plants.

Answer 2

Tropism is defined as the propensity of a plant to direct itself away (negative tropism)  or towards (positive tropism) the stimuli. Plants that bend their roots towards a more humid environment exhibits positive hydrotropism as humidity is related to the water content of the environment.

Gravitropism and geotropism have the same definition wherein plants move towards or away from gravity.