One of the Most Famous A

question 37

Multiple Choice

One of the most famous A. afarensis fossils is named Lucy. Why is it so famous?

• A) it was one of the most complete skeletons found
• B) because she was named after the song, "Lucy in the Sky With Diamonds"
• C) because no other afarensis fossils have been found
• D) because it was found in Ethiopia

---

Definitions:

Ascending Fibres

Nerve fibers that carry information from the body's sensory receptors upward to the brain, particularly pertinent to the sensory pathways.

Reticular Activating System

A network of neurons located in the brainstem that plays a central role in regulating wakefulness and sleep-wake transitions.

REM Sleep

A stage of sleep characterized by rapid eye movement, vivid dreams, and increased brain activity.

Reticular Formation

A complex network of nerve pathways in the brainstem involved in consciousness and alertness.