Answer:D 
Explanation: Because it has the least amount of density in it. All the others are heavier, meaning they will sink. Just like if you drop a rock water and a feather, the feather will float. 
Density def: 
Density, mass of a unit volume of a material substance. ... Density offers a convenient means of obtaining the mass of a body from its volume or vice versa; the mass is equal to the volume multiplied by the density (M = Vd), while the volume is equal to the mass divided by the density (V = M/d). 
 
        
                    
             
        
        
        
Answer:
The complimentary strand of codons would be CAG-UAC-AAA-UCA-AGG-GAU-AUC.
Explanation:
C (Cytosine) pairs to G (Guanine).
Think of it as *C*ar in the *G*arage.
A (Adenine) pairs to U (Uracil).
Think of it as *A*pples *U*nder the tree.
 
        
                    
             
        
        
        
Answer:
I think this should be the chart you were interested in...
Explanation:
                                           Individual             Shape in              shaded
                                           phenotype           pedigrees
Male with gen. TT             PTC taster             square                No
Male with gen. Tt              PTC taster             square                No
Male with gen. tt               Non-taster             square                Yes
Female with gen. TT        PTC taster              Circle                  No
Female with gen. Tt         PTC taster              Circle                  No
Female with gen. tt          Non-taster              Circle                 Yes
*gen- genotype