How Does the Fraction of Oxygen in Earth's Atmosphere Today

question 96

Multiple Choice

How does the fraction of oxygen in Earth's atmosphere today compare to what it was 3 billion years ago?

• A) It has significantly declined.
• B) It has significantly increased.
• C) It increased up to 2 billion years ago but has been declining ever since.
• D) It declined up to 2 billion years ago but has been increasing ever since.
• E) It hasn't changed.

---

Definitions:

Expected Life

The anticipated duration a fixed asset is likely to be useful in business operations before needing replacement.

Residual Value

The anticipated price that an asset will fetch at the time of its disposal, following the conclusion of its useful lifespan.

Adjusted Trial Balance

A compilation of every account along with their revised balances following adjustment entries, utilized in the preparation of financial reports.