Answer:
There was no oxygen in the flask.
Explanation:
Anaerobic organism do not need oxygen!!
 
        
             
        
        
        
Answer:
protons is 7  neutrons should be 9 
Explanation:
protons number is its atomic number
 the number of protons and the number of neutrons determine an element's mass number.
 
        
             
        
        
        
You can google it at www.google.com 
 
        
             
        
        
        
Answer:
Neanderthals
Explanation:
Homo sapiens encountered neanderthals in europe and had offspring.
 
        
             
        
        
        
Answer:
A. proteins
Explanation:
Amino acids builds up the proteins.