Oxygen Was One of the Original Gases in Abundant in Earth's

question 12

True/False

Oxygen was one of the original gases in abundant in Earth's atmosphere before the evolution of life.

---

Definitions:

Masseter

A facial muscle that plays a major role in the chewing of solid foods, one of the strongest muscles in the human body.

Semitendinosus

A muscle in the back of the thigh, part of the hamstring group.

Gastrocnemius

A large muscle located on the back portion of the lower leg, forming part of the calf, that aids in walking, running, and jumping.

Biceps Femoris

A muscle of the thigh that is part of the hamstrings, involved in knee flexion and thigh extension.