Answer: Just did the lesson on this, the answer is  C.
Explanation:An allele is one of the possible forms of a gene. Most genes have two alleles, a dominant allele and a recessive allele. If an organism is heterozygous for that trait, or possesses one of each allele, then the dominant trait is expressed. ... So a gene is a particular region of your DNA that controls a specific trait.
 
        
             
        
        
        
Yeast means <span>microscopic fungus consisting of single oval cells that reproduce by budding, and are capable of converting sugar into alcohol and carbon dioxide. 
mold is where we get medicine from.
mildew is </span>a thin whitish coating consisting of minute fungal hyphae, growing on plants or damp organic material such as paper or leather.
mushrooms increase spread and develop rapidly.
i hope this helps u.
        
                    
             
        
        
        
Answer:
Yes it does, it doesn't hurt the mice a bit 
Explanation:
 
        
             
        
        
        
The right choice of them is biosphere, community, and organism.