2 Points
Which of the following correctly compares the oxygen isotopes 16O and 18O?
O
A. 16Ohas 8 neutrons, whereas 18Ohas 10 neutrons.
B. 16Ohas 16 neutrons, whereas 18Ohas 18 neutrons.
C. 16Ohas 16 protons, whereas 18Ohas 18 protons.
O
D. 16O has 8 protons, whereas 18O has 10 protons.

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.