What can you infer from the fact that there is the same amount of water on the plant
now as there was one billions year ago
A. the total amount of water on earth changes gradually over time.
B. there will be probably be the same over time.
C. amount of water on plant's a billions years from now there have been many fluctuation in water cycle over billions years.
D. There will be much less water on earth one billions of years for now

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.