Which is true of living things?
a. their chemical balances are maintained by acid-base reactions
b. they are damaged when they are exposed to any kind of acid
c. they are damaged when they are exposed to any kind of base
d. their chemical balances require completely neutral solutions

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.