An Archaeological Dig in Africa Discovers a Collection of Stone

question 70

Multiple Choice

An archaeological dig in Africa discovers a collection of stone tools along with several skeletons in a cave.These bipedal skeletons date to about 3.5 million years ago and show no evidence of a partially opposable toe.Measurements indicate the brains would have been a little less than a third of the volume of modern humans.The teeth found on these skeletons look more like those of an ape than those of a human.This skeletal discovery is most likely which of the following?

• A) Sahelanthropus tchadensis
• B) Ardipithecus ramidus
• C) Australopithecus afarensis
• D) Homo erectus

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Definitions:

Tailbone

The terminal end of the vertebral column in humans and certain other creatures, formally known as the coccyx.

Coccyx

The small tailbone at the lower end of the vertebral column, comprising three to five fused vertebrae.

Lumbar

Referring to the lower part of the spine or the lower back region.

Thoracic

Pertaining to the chest region or the thorax, which houses the heart and lungs among other organs.