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Extinct vs. Extant

APBIO-ICNYPH

The cladogram shown below proposes an evolutionary relationship among Species A-C.

Which of the following statements BEST describes the origins of Species A?

Created for Albert.io. Copyright 2016. All rights reserved.

A

The shortened arm of Species A suggests that it is an extant (archaic, but in existence) species that has retained traits of its ancestor.

B

Species A is an extinct species that shared a common ancestor with Species B and Species C.

C

Species A does not share traits with Species B or Species C.

D

Species A has evolved from an ancestor that also gave rise to extinct Species B and Species C.