Are the backbones of the dna molecule identical in all living things

People keep spending additional units of a particular resource on a want until their marginal benefit is  decreasing withgreater thanless thannot affected by  their marginal cost.

Which of the following statements best describes the quantity theory of inflation? a.inflation occurs because production cost rise and this cost increase is passed on to consumers in the form of higher prices b. inflation occurs because there is too much money in the economy c. inflation occurs because demand of good and services exceeds existing supplies d. none of these

Can you give an explanation of what medc and ledc are.