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. Thus, which statement should be true?
A) Species X and Y are not related to species Z.
B) Species X and Y share a greater number of homologies with each other than either does with species Z.
C) Species X and Y share a common ancestor that is still extant (in other words, not yet extinct).
D) Species X and Y are the result of artificial selection from an ancestral species Z.
E) Species X, Y, and Z share a common ancestor, but nothing more can be claimed than this
Segregation according to resource factor among 40 species of British passerine birds.
Elephant footprints (tire tracks for scale)
Hemiphlebia mirabilis, the Ancient Greenling, is a species of damselfly in family Hemiphlebiidae.
Species
Skeletons of a human and an elephant
Four kinds of evidence supporting the theory that species evolve.