To complete the chart regarding the conditions under which stomata open or close to regulate gas exchange, here's how it generally works:
1. **Daytime**:
- **Stomata Open**: During the day, stomata typically open to allow for gas exchange (CO2 in, O2 out) for photosynthesis.
2. **Nighttime**:
- **Stomata Closed**: Stomata usually close at night because there is no sunlight for photosynthesis, and plants lose water through transpiration if they are open.
3. **Carbon Dioxide Needed**:
- **Stomata Open**: Stomata open to take in CO2 for photosynthesis during daylight.
4. **Oxygen Produced by Photosynthesis**:
- **Stomata Open**: Stomata are open to release oxygen produced during photosynthesis.
5. **Hot Daytime Temperatures**:
- **Stomata Close**: In very hot conditions, stomata may close to prevent excessive water loss through transpiration, even during the day.
Based on these explanations, here’s how you can complete the chart:
- **A Daytime**: Stomata Open
- **B Nighttime**: Stomata Closed
- **C Carbon Dioxide Needed**: Stomata Open
- **D Oxygen Produced by Photosynthesis**: Stomata Open
- **E Hot Daytime Temperatures**: Stomata Closed
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