Answer:
four codon in mRNA sequence code for serine aminoacid.
Explanation:
UCA
UCG
UCC
UCU
these four codons code for aminoacid serine.
 
        
             
        
        
        
1.the air cannot support any additional water vapr
2.endothermic reactions
3.50%
4.false 
5. false
 
        
             
        
        
        
Answer:
the correct answer is enzymes 
Explanation:
enzyme act as catalyst and is a biological molecule which within the cell membrane can speed up or increase the rate of biological reaction without affecting itself and is obtained unchanged at the end of reaction 
 
        
                    
             
        
        
        
Answer:
Stomata are tiny holes found in the underside of leaves. They control water loss and gas exchange by opening and closing. They allow water vapour and oxygen out of the leaf and carbon dioxide into the leaf.
Explanation: