Answer:
the genotype of the parent guinea pigs are as follows:
RrBb (rough, black) and Rrbb (rough, white)
Explanation:
Since the phenotype of smooth coat is present in the offspring, the parent genotype cannot have RR alleles for their coat. Similarly, the rough, black parent cannot have BB alleles in its genotype because that will not yield a white coat color in its offspring.
After making the dihybdrid cross, the probability obtained for each phenotype is given below: 
rough black: 
rough white: 
smooth black: 
smooth white: 
Hope that answers the question, have a great day!
 
        
             
        
        
        
Answer:
C
Explanation:
because there is not enough surface area to grow more
 
        
             
        
        
        
B) Rust, because it has tightly arranged hyphae
        
                    
             
        
        
        
The high heat capacity of water prevents fish body temperatures from changing during the winter.
        
             
        
        
        
Answer:
Metamorphic rock
Explanation:
metamorphic rock formed when limestone is exposed to high temperatures and pressures. Marble forms under this condition because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals.