Suppose a scientific team is trying to recreate the energy-producing reactions that occur in the Sun. What would they need for the experiments? hydrogen atoms, heat, and pressure
hydrogen atoms, helium atoms, heat, pressure, and energy
helium atoms and energy
helium atoms and hydrogen atoms

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.