<em>When water is abundant:</em>
-Temporal regulation of stomata is used:
Open during the day
Closed at night
- At night, there is no photosynthesis, so no demand for CO2 inside the leaf.
- Sunny day = demand for CO2 in leaf is high = stomata wide open.
- As there is plenty of water, plant trades water loss for photosynthesis products. 
-  If the leaf's CO2 concentration is low, the stomata will stay open to continue fueling photosynthesis. 
- High temperatures will also signal stomata to close.
- When limited water is available in the soil, plants try to prevent water loss. 
 
        
             
        
        
        
A cancer causing gene is caused by a mutation in a gene. 
        
                    
             
        
        
        
Answer:
the element oxygen , represented by the symbol o, is classified as a pure substance
 
        
             
        
        
        
The answer is B) prime meridian
It is the opposite of the equator. If you need more of and explanation please just ask.