B. White petal colour is a recessive trait.
Explanation:
In Mendelian genetics, the alleles depicted in small letters are recessive traits.
Since both alleles are same and in lower case they are homozygous recessive alleles for a white coloured petal gene.
The genotype of the trait will be tt because if it is crossed either with heterozygous or homozygous P alleles it will appear as tt to have phenotypic trait of white colour.
 So the genotype will be tt.
 
        
                    
             
        
        
        
Darwin explained that evolution occur due to natural selection.
        
             
        
        
        
Microbiology studies organisms too small to be seen with the naked eye
        
             
        
        
        
I would say down wind side but I'm not 100% sure
        
             
        
        
        
Answer:
Eggshells are made of calcium carbonate. If you soak an egg in vinegar the eggshell will absorb the acid and break down, or dissolve. The calcium carbonate will become carbon dioxide gas, which will go into the air.
Explanation:
It will bounce. 
I believe that it is testable because you can do it at home. 
Independent variable is vinegar.