What Two Gases Were Most Abundant on Early Earth

question 18

Multiple Choice

What two gases were most abundant on early Earth?

• A) O₂ and CO₂
• B) N₂ and H₂
• C) CO₂ and H₂
• D) CO₂ and N₂

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Definitions:

Steroids

A group of organic compounds including hormones and vitamins that play key roles in the body's metabolic, immune, and reproductive functions.

Cushing Syndrome

A condition caused by prolonged exposure to high levels of cortisol, leading to symptoms such as weight gain, thinning skin, and high blood pressure.