Question

1. what are stomata?
2. how do plants conserve water?
3. what is teh consequence of keeping stomata closed for a long time?
4. how much of an average plants body weight is water?

Explanation:

1. Stomata are tiny pores on plant leaves. They allow gas exchange (like CO₂ in, O₂ out) and transpiration (water vapor release).
2. Plants conserve water by closing stomata (e.g., in hot/dry conditions), having waxy cuticles on leaves to reduce water loss, and some plants (like succulents) store water in tissues.
3. If stomata are closed long - term:

• Photosynthesis is limited (less CO₂ intake).
• Transpiration - driven water and nutrient uptake (from roots) slows as transpiration pull is reduced.

1. On average, about 80 - 90% of a plant's body weight is water. This is because water is crucial for photosynthesis (as a reactant in light - dependent reactions), turgor pressure (to keep plant cells rigid), and as a solvent for transporting nutrients.

Answer:

1. Tiny pores on plant leaves for gas exchange and transpiration.
2. By closing stomata, having waxy cuticles, and water - storing tissues (in some plants).
3. Reduced photosynthesis (less CO₂) and slower water/nutrient uptake (due to less transpiration pull).
4. About 80 - 90%.