Each degree on the kelvin scale equals how many degrees on the celsius scale?

-1
-10
-no relationship (different scale)
-2.12

The answer is 1 kelvin, but we assume that you are converting Kelvin to degree celsius, following the formula T(c)= T(k)-273.15. Subsequently after the omission of -273.15, the relative equivalent of kelvin per celsius will be 1 unit. For example:
       Convert: 300 k to degree celsius             301 k to degree celsius
        Solution: T(c)= 300 k - 273.15                T(c) = 301 k -273.15
                              = 26.85 k                                    = 27.85
                            
                                 27.85 k -26.85 = 1 k

Genetic engineering is the answer.