c.Stomata are generally open during the day to remove excess water from the planet and closed at night to keep oxygen from escaping.
 
        
                    
             
        
        
        
Xh is the recessive trait found in the female chromosome.
        
                    
             
        
        
        
It means that they are classified into 2 different categories.  
        
             
        
        
        
Answer: There are 47 chromosomes in each body cell.
Explanation:
 
        
             
        
        
        
Answer:
The correct answer is There is one factor salt(restricted, unrestricted).
Explanation:
Vegetarian diet and low salt diet are both promising in the treatment of hypertension or high blood pressure.
         In the given question there is only factor that is variable that is restricted salt and unrestricted salt .
        This is because both normal diet and vegetarian diet are same that"s the term diet is not variable.