Which is an example of a vestigial structure?
a. a fish fin
b. tailbone of a human
c. tail of a monkey
d. flower of a plant

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Hurry where is the majority of earth's water found? o glaciers o oceans ground o rivers and lakes

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.