Answer:
Electrolytes are minerals in body fluids. They include sodium, potassium, magnesium, and chloride.
 
        
                    
             
        
        
        
Distributive (or vasogenic) shock is caused by a sudden severe decrease in peripheral vascular resistance that causes extensive pooling of blood within the venous system and subsequent decreased venous return to the heart.
 
        
             
        
        
        
Answer:
Option A
Explanation:
Options - 
A-avoid water pollution.
B-build thermal power plants.
C-add water features to gardens.
D-avoid drip irrigation systems
Solution - 
The largest source of freshwater on planet earth is underground water. The water beneath the surface of earth is very limited. The total fresh water reserve on earth is 3% of the total water on earth. Pollution due to discharge of waste water into the rivers and oceans has caused the degradation of not only surface water but also ground water.  
Thus, option A is correct
Drip irrigation is a means to prevent wastage of water during irrigation. Thus, avoiding it will cause further loss of fresh water.  
Addition of water feature will increase usage of water, thus it is also incorrect
Building thermal plant will also cause water pollution and wastage. Hence, option  B is also incorrect
 
        
             
        
        
        
Answer:
it regulates blood volume and blood pressure.
Explanation:
 
        
             
        
        
        
Answer:
A point mutation is a type of mutation in DNA or RNA, the cell’s genetic material.
Explanation:
DNA and RNA are made up of many nucleotides. There are five different molecules that can make up nitrogenous bases on nucleotides: cytosine, guanine, adenine, thymine (in DNA) and uracil (in RNA), abbreviated C, G, A, T, and U.