Some species of bacteria benefit humans. What information in the text supports this statement?
A S. mutans is a bacterium that causes cavities, and S. pneumonia is a
bacterium that causes pneumonia.
B Fungi evolved the ability to produce anti-bacterial chemicals as they
competed with bacteria over millions of years.
The bacterium Streptococcus pyogenes causes strep throat and rheumatic
heart disease.
D Species of bacteria belonging to the genus Bacteroides help the human
body digest food.

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.