The following questions refer to Figure 19.1, which shows an outcrop of sedimentary rock whose strata are labeled A-D.
Figure 19.1
-Currently, two extant elephant species (X and Y) are placed in the genus Loxodonta and a third species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness, which of the following is the most accurate phylogenetic tree?

Question

The following questions refer to Figure 19.1, which shows an outcrop of sedimentary rock whose strata are labeled A-D.
  Figure 19.1
-Currently, two extant elephant species (X and Y) are placed in the genus Loxodonta and a third species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness, which of the following is the most accurate phylogenetic tree?

Quizplus · Accepted Answer

Option D shows the correct phylogenetic tree where species X and Y are more closely related to each other than either is to species Z, reflecting their current classification in the same genus.

The Following Questions Refer to Figure 19