Nitrogen.
 Plants cannot use atmospheric nitrogen directly. Nitrogen from the air must be converted into the different form so plants can absorb it. Thus plants need nitrogen-fixing bacteria to convert atmospheric nitrogen into ammonium, which is available for plants to absorb it.
 
        
             
        
        
        
Answer:
"Carbon-14 dating can determine the age of an artifact that is up to 40,000 years old. Living organisms absorb carbon my eating and breathing." Credit to NDT
Explanation:
Mark as brainliest please >_<
 
        
             
        
        
        
Answer:
 they can fly , which requires alot of energy & keep their body warm with their feathers 
 
        
             
        
        
        
Answer:
Removal of introns
Explanation:
the reduction in the sequence is as a result of the removal of introns. Introns are actually non-coding regions and do not code for proteins. they are usually spliced out.
 
        
             
        
        
        
Its no wonder growing up under the roof of a tyrant, that I would be the poster boy for defiance. Now im the voice of the silence.