Answer:
By running them under water. The water will separate the rocks from the dirt.
 
        
             
        
        
        
Yes it is C but for future reference, both A and B are referring to solids, and D is referring to a gas, hope this is helpful later!
        
             
        
        
        
Answer:
B. Mitochondrion
Explanation:
The Krebs Cycle occurs in the mitochondria during the processes of cellular respiration.
Specifically, it occurs in the matrix of the mitochondria.
 
        
             
        
        
        
O allele 60 + 60+30 = 150
o allele 
30 + 10+10 = 50
O allele frequency = 150/200 = 0.75
Thus, the O allele frequency is 3/4 or 0.75
o allele frequency = 50/200 = 0.25
The o allele frequency is 1/4 or 0.25
        
             
        
        
        
The first image is the answer.