Answer:
Tropic movement in plants refers to directional growth responses to environmental stimuli. These movements are categorized based on the type of stimulus:
1. **Phototropism**: Growth towards or away from light. For example, plants growing towards light.
2. **Gravitropism (or Geotropism)**: Growth in response to gravity. Roots typically exhibit positive gravitropism (growing downwards), while stems show negative gravitropism (growing upwards).
3. **Hydrotropism**: Growth in response to moisture gradients. Roots may grow towards areas with higher water availability.
4. **Thigmotropism**: Growth in response to touch or physical contact. For instance, vines wrapping around a support structure.
These movements help plants adapt to their environment and optimize their growth and survival.
Tropic movement in plants is a growth response to environmental stimuli, allowing them to adapt and optimize survival. Key types include **phototropism**, where plants grow towards light; **gravitropism** (or geotropism), where roots grow downward and stems upward in response to gravity; **hydrotropism**, where roots grow towards areas with higher moisture; and **thigmotropism**, where plants grow in response to physical contact, like vines wrapping around supports. These movements are crucial for plants to effectively navigate their surroundings, ensure proper resource acquisition, and support their overall growth and development.
Explanation:
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