Modern Humans Evolved Approximately ____ Years Ago

question 53

Multiple Choice

Modern humans evolved approximately ____ years ago.

• A) 65 million
• B) 20 million
• C) 1 million
• D) 500,000
• E) 100,000

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Definitions:

Periosteum

Thick, double-layered connective tissue sheath covering the entire surface of a bone, except the articular surface, which is covered with cartilage.

Femoral Nerve

A major nerve in the leg that supplies sensation to the front of the thigh and part of the lower leg as well as motor control to muscles of the leg and hip.

Quadriceps Femoris

A large muscle group that includes four muscles on the front of the thigh, responsible for extending the knee and stabilizing the patella.

Iliopsoas

A large muscle group consisting of the iliacus and psoas major muscles, crucial for flexing the hip and spinal articulation.