You Find a Fossil That You Are Sure Shows Evidence

question 32

Multiple Choice

You find a fossil that you are sure shows evidence of bipedalism.You know this because which of the following anatomical traits are present?

• A)a narrow pelvis
• B)posterior position of the foramen magnum
• C)opposable hallux
• D)thigh bones that angle in toward the knees

---

Definitions:

Pre-1950 Ozone Levels

The concentration of ozone in the Earth's stratosphere before the significant increase in human-made emissions affecting the ozone layer.

Earth

The third planet from the Sun, uniquely supporting life within the solar system.

Chlorofluorocarbons

A group of man-made chemical compounds containing chlorine, fluorine, and carbon, historically used in refrigeration and aerosol propellants, but now known to deplete the ozone layer.

Flammable

Easily ignited and capable of burning rapidly; used to describe substances that pose a significant fire risk.