The Spinal Cord Passes Through an Opening in the Skull

question 37

Multiple Choice

The spinal cord passes through an opening in the skull and connects to the brain.Which development in human evolution does the study of this feature of our anatomy shed light on?

• A) primate vision
• B) primate intelligence
• C) a trend towards upright posture
• D) increased manual dexterity

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Definitions:

Crater Lake

A lake that forms in a volcanic crater or caldera after the volcano becomes inactive and the crater or caldera fills with precipitation or melted snow.

Volcanic Dome

A rounded volcanic feature created by thick lava that does not flow far from its eruption site, often forming after an eruption.

Scoria Cone

A small, steep volcanic cone built from lava fragments (scoria) ejected during gas-charged explosive eruptions.

Pumice

A light, porous volcanic rock formed from explosive eruptions, known for its ability to float on water.