Answer
Thermoregulation
Blood clotting
Regulating blood sugar
Explanation:
Negative feedback loop reduces excessive function..
Cooling the body when it's hot.
Reducing blood sugar when it's too much.
Clotting blood to stop excessive bleeding.
Contractions during childbirth is a positive feedback.
 
        
             
        
        
        
Hey there! :D
When we are talking about gametes, we can use a punnet square, or in this case, common knowledge. If two of the alleles for one phenotype are the same, we can infer there will only be two variations of the genotype. (because there are two dominant SS genes) We already know that "D" must be the answer. Firstly, there will be one allele for each gene, so there will always be an "S" and a "T" no "SS" or "tt" (when talking about gametes). That leaves us with B and D but there is no recessive "s" in the original genotype, so the answer must be "D". 
I hope this helps!
~kaikers 
 
        
             
        
        
        
The answer is F. Interest Rate