Answer:
The link reaction converts pyruvic acid to Acetyl-CoA.
I hope it's helpful!
 
        
             
        
        
        
For a fish to be buoyant, or float, it must displace less water or the same amount of water as its own body mass. ... Many fish use swim bladders to help them with quick depth changes. These bladders fill with air to help fish rise or release air so fish can sink, often in conjunction with forward movement.
 
        
                    
             
        
        
        
Both answers C and D are correct, however, answer D makes more sense.
 
        
             
        
        
        
Answer:
more distant galaxies are moving away faster.
the shift towards red (Doppler effect like with sound on Earth) is the indication. 
Explanation:
what did this have to do with biology ?
and by the way, this is also something I debate severely in scientific communities, because yes, the red shift is there. but "more distant" also means "more in the past", so that the data shows us actually that things in the past moved faster away. not necessarily today ...
 
        
             
        
        
        
Upper arm/elbows front side