Answer:
 here I found it on Google 
 
        
             
        
        
        
Answer:
Photosynthesis and Respiration
Explanation:
In photosynthesis C is used in the form of CO2.
In respiration C is released in the form of CO2.
 
        
             
        
        
        
Answer:
The hardness rating is 4.
Explanation:
Calcite sits at a hardness rating of 3 and is very easily scratched with a knife and/copper coin.  This is where most Marbles, limestones, travertines, rate.
Meanwhile, Fluorite sits at hardness 4 and can be scratched by a knife.
 
        
             
        
        
        
Answer:
As a cell grows, its surface area-to-volume ratio decreases