System is a group of similar organs working together...... Organ is a group of similar tissues forming a layer in an organism which perform a specific function.....tissue is a group of similar cell which carry out a particular function
        
             
        
        
        
Answer:
B.
1-3hours
Explanation:
This is because a diabetic patients have increased blood sugar or glucose concentration. After eating a meal, the blood glucose concentration will be increased as it is been accumulated . Therefore it is best diabetic patient exercise at that hour to reduce it's blood glucose concentration.
 
        
             
        
        
        
Explanation:
The reading on the scale is
W = m(g + a)
 = (77 kg)(9.8 m/s^2 + 2 m/s^2)
 = 908.6 N
 
        
             
        
        
        
It’s me again lol you’re questions are simple the formula is given in the triangle 
The answer is C 39 hz
Please look at the attached image below for the explanation
 
        
        
        
Answer:
C
Explanation:
a series circuit would be an odd choice to power a battery or light a lamp when a direct would be much more efficient, and it's not converting types of energy, so C is the best possible answer