Answer:
The electron transport chain is the third and final step of cellular respiration. At the end of the electron transport chain, the hydrogen from the coenzymes meets the oxygen which the cell has consumed and reacts with it to form water. Therefore, water is created as a byproduct of the metabolism reaction.
 
        
             
        
        
        
Answer:
conscious neural control
Explanation:
Neural control of digestive tract is unconscious achieved via the autonomic nervous system.
Local nervous system of the digestive system is called the enteric or intrinsic nervous system. The major components of this nervous system are two networks or plexuses of neurons:
•	The myenteric plexus – controls digestive tract motility
•	The submucous plexus - regulates gastrointestinal blood flow and controls epithelial cell function.
 
        
             
        
        
        
Biological systems do not contradict the second law of thermodynamics. Even in this case, entropy is still always increasing. Biological systems can only decrease their own entropy by using copious amounts of energy and by increasing entropy in their surrounding environment. Also, unfavorable anabolism reactions are always paired with more favorable reactions, such as the use of ATP in order to make the overall Gibb's free energy of the reaction negative.
        
             
        
        
        
Answer:
 mg of powder 1 and
 mg of powder 1 and  mg of powder 2
 mg of powder 2
Explanation:
Let "X" denotes weight of powder 1 added to the new mixture and  "Y" denotes weight of powder 2 added to the new mixture
Total weight of vitamin B1 in the mixture is equal to  mg
 mg
Total weight of vitamin B2 in the mixture is equal to  mg
 mg
Equation 1

Equation 2

Let us simplify the above two equations, we will get 


Substituting value of X in equation 2 we get 
