Australopithecus Sediba, a New Fossil from South Africa, Is Considered

question 43

Multiple Choice

Australopithecus sediba, a new fossil from South Africa, is considered by some paleoanthropologists to be a bridge between australopithecines and the human lineage. This is because

• A) Australopithecus sediba is the oldest fully bipedal ape fossil.
• B) Australopithecus sediba shows a mix of ape features and humanlike features.
• C) Australopithecus sediba is younger than Homo erectus.
• D) Australopithecus sediba had a human-sized brain but still lived in trees.
• E) many researchers suspect that there was genetic admixture between Australopithecus sediba and Homo populations.

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Definitions:

Cuticle

Outer, thin layer, usually horny—for example, the outer covering of hair or the growth of the stratum corneum onto the nail.

Medulla

The innermost part of an organ or structure, such as the central region of the kidney or the lower part of the brainstem.

Central Axis

An imaginary line that runs through the center of a body or object, around which the body or object can theoretically rotate.

Medulla

An area at the base of the brainstem that controls vital functions such as heart rate, breathing, and blood pressure.