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
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The factors are: The size of the sample, the extraction method, the method of purification and preservation of the DNA. 
The quantity and quality of DNA can be greatly improved by performing PCR.
* Purification of nucleic acids is a key step for functional studies in biology. Because of the great diversity of living organisms in nature, purification becomes a real challenge for researchers, especially cell lysis.
The evolution of lysis methods has made it possible to improve efficiency, speed and simplicity. But, this lysis step remains a crucial step for the efficiency and the quality of the purification.
 
        
             
        
        
        
Plants are autotrophs because they carry out photosynthesis and produce food for themselves. 
<span>Fungi does not contain chlorophyll or carry out photosynthesis, which is why you can find a lot of fungi in dark places. Fungi takes its nutrients from dead organic matter, which is why you would find fungi on rotten fruits and dead animals.</span>