I ink what the other person said
        
             
        
        
        
No the myelin covers bits of the cell
        
                    
             
        
        
        
Answer:
D. 1 BB : 2 Bb : 1 bb
Explanation:
This question involves a single gene coding for fur color in guinea pig. Black fur (B) is dominant over white fur (b). This means that, as stated in the question, if a black fur parent (BB) is crossed with a white fur parent (bb), a 100% heterozygous offspring (Bb) with black fur will result. 
If two heterozygous guinea pigs are crossed i.e. Bb × Bb, the following gametes will be produced by each heterozygous parent:
Bb = B and b
Using these gametes in a punnet square (see attached image), offsprings with the following genotypic ratio will be produced: 
1 BB : 2 Bb : 1 bb
BB and Bb = black fur guinea pigs
bb = white fur guinea pigs
 
        
             
        
        
        
Answer:
I could be wrong but I believe it is,
"rocks," and "dark matter"
 
        
             
        
        
        
Answer:
#2 & #3 
Explanation:
both have the same amino acids. like leucine