Which of the Following Traits Was Likely Deleterious for Early

question 55

Multiple Choice

Which of the following traits was likely deleterious for early hominins?

• A) a large brain compared to body size
• B) bipedal walking
• C) a pronounced arch and heel in the foot
• D) an opposable big toe on the foot

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Definitions:

Olecranon Process

The bony projection at the upper end of the ulna, forming the point of the elbow.

Ulnar Notch

A small depression on the distal end of the radius bone, where it articulates with the head of the ulna bone in the forearm.

Articulates

Describes how bones connect or join with each other, often to form joints that allow for movement and support of the body.

Radius

A bone in the forearm on the lateral side (thumb side), which runs parallel to the ulna and is involved in forearm rotation.