what are "nastic" and "curvature" movements?Give one example of each
Share
what are "nastic" and "curvature" movements?Give one example of each
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Explanation:
♦Nastic movements and curvature movements are types of plant responses to environmental stimuli.
1. **Nastic Movements:** Nastic movements are non-directional responses to environmental stimuli, typically involving changes in turgor pressure in cells. They are not oriented toward or away from the stimulus but are often triggered by factors like light, temperature, or humidity. One example is the closing of the flower petals at night, called nyctinasty. The petals close in response to darkness, and this movement is not based on the direction of the light source.
2. **Curvature Movements:** Curvature movements, also known as tropic movements, are directional responses of plants to external stimuli. These movements involve the plant bending or curving toward or away from the stimulus. For example, phototropism is a curvature movement in response to light. When a plant exhibits positive phototropism, it bends toward the light source. An example of negative phototropism is when plant roots grow away from light and into the soil.
♣
Answer :
• nastic and curvature movements are types of plant responses to environment stimulus
Example :
Nastic movement :
These are non directional movements which are neither towards away from the stimulus
example :
dropping of leaves
Curvature movements :
in such moment plant organs towards or away from the stimulus
example :
bending of shoot towards a source of light