When dna ladder's rungs are the same width, why do a-t and g-c form complementary base pairs according to chargaff's rule
a. the larger c pairs with the smaller a, and the larger g pairs with the smaller t.

b. the larger a pairs with the smaller g, and the larger t pairs with the smaller c.

c. the larger a pairs with the smaller t, and the larger g pairs with the smaller c.

d. the larger t pairs with the smaller a, and the larger c pairs with the smaller g.

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.