The pH of blood if pco2 drops to 35.0 mmHg is 7.459
The pH of the blood can be calculated using the Henderson- Hasselbalch equation, which explains the relationship between acid dissociation constant pKa and pH in biological and chemical systems.
pH = pK + log ( HCO3- / ( 0.03 * PCO2 ) )
pK is 6.1 for the bicarbonate buffer system.
HCO3- = 24mm
PCO2  = 35.0 mmhg
pH = 6.1 + log ( 24 / 0.03 * 35.0 )
     = 6.1 + log ( 24 / 1.05 )
     = 6.1 + log 22.8571
     = 6.1 + 1.3590
     = 7.459
Hence, the pH of blood is 7.459
Learn more about the pH of blood here brainly.com/question/3919636
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<span>Human skin color variations are primarily being determined by the type and amount of melanin pigment which is the skin. 
The reason is the amount of melanin present, pigment present which determines the color of skin the more the melanin the more dark color they are. 
Human skin color variation is likely evolved in response to differences in intensity of sunlight around the world. Reason being it has been developed because of different exposure of humans to the varied environment during migration. Human skin color variation evolved recently in hominid evolution.</span>
        
                    
             
        
        
        
The answer is it controls the order in which which proteins are made. 
there is a certain pattern in your dna that gets replicated to create the RNA that goes to create your proteins.
        
             
        
        
        
Most likely the correct answer among the choices listed is option A. The absence of oxygen causes a switch from aerobic to anaerobic respiration. Aerobic respiration requires oxygen to occur while anaerobic respiration do not.