Concept explainers
To review:
The direct stimulus involved in gravitropism and phototropism.
Introduction:
Plants are unable to move from one place to another but they have different mechanisms by which they can change the orientation of their body parts in response to external stimuli. Tropism is a term that is used to describe the movement of plant parts away or toward a unidirectional stimulus like light and gravity.
Permanent changes in plant parts are created as a result of different responses to external stimuli. When the plant parts move in response to a light stimulus then the process is called phototropism. When the plant parts move in response to the gravitational pull of earth then the process is called the gravitropism.
Want to see the full answer?
Check out a sample textbook solutionChapter 37 Solutions
Biology: The Dynamic Science (MindTap Course List)
- What are the TWO (2) light regions detected by phytochromes and identify photoreceptor responsible for phototropism response in plants? *arrow_forwardDescribe phototropism, gravitropism, and thigmotropism.arrow_forwardWhat are the major benefits of gravitropism for a germinating seedling?arrow_forward
- Describe phototropism. What plant hormone is responsible for phototropism? Where would this hormone accumulate to initiate the respnse?arrow_forwardHow does blue light trigger stomatal opening?arrow_forwardWhat is the biological importance of a flower? What is the difference between microsporogenesis and megasporogenesis?arrow_forward
- Which is common to the life cycles of both flowering and non-flowering plants? a) produce fruit b) stay dormant c) pollination d) producing conesarrow_forwardWhat major factor controls the photomorphoses of germinated seeds? Explain briefly its role.arrow_forwardWhat are Phytochrome, photoreceptor, red and far-red light?arrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning