Amolecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 20 million years. how many years ago did two species share a common ancestor if the molecules found in these two species differ by a total of six mutations?

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

Describe two recent or ongoing space missions.

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.