Genes 
Hereditary 
Trait
Genotype
Sex cell
        
             
        
        
        
Wind because its not mechanically eroding them..
        
                    
             
        
        
        
Energy comes from making bonds in carbon dioxide and water.
        
             
        
        
        
Answer:
Pacemaker cells are located in the <u>sinoatrial node.</u>
Contractile cells are located in the <u>Heart</u>
Explanation:
 
        
                    
             
        
        
        
Explanation:
The higher the volume of water in a stream, the higher its speed and the wide its size and shape which ensures a proportionate flow rate. 
 To quantify how the speed of stream, we use the quantity, discharge in hydrology; 
  Discharge is the volumetric rate of water flow past a point at a particular time. 
   Discharge = 
- We see that discharge is directly proportional to the volume of water in a stream. 
- It is inversely proportional to the time taken. 
- We know that volume is the amount of space occupied by a body. It is function of its size and shape. 
-  A big water body that is deeper, wider and longer will have more wate and a greater discharge. 
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Rejuvenation brainly.com/question/14372082#
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