Ethanol is a fuel that can be made from corn. one of the benefits of using a biomass fuel like ethanol is a. it can only be used to power certain types of machines. b. it is a nonrenewable resource. c. it is a renewable resource. d. it releases pollutants when it is harnessed.

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.