Recent Discoveries of Microscopic Fossils Have Extended the Known History

question 48

Multiple Choice

Recent discoveries of microscopic fossils have extended the known history of life to about:

• A)1 billion years ago.
• B)2 billion years ago.
• C)3.5 billion years ago.
• D)4.5 billion years ago.

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Definitions:

Arterial Blood Gases

A test that measures the levels of oxygen, carbon dioxide, and other gases in the blood, usually taken from an artery, to assess lung function.

Radial Artery

A major artery in the forearm, commonly accessed for arterial blood sampling or catheter insertion.

Hypothermia

A medical emergency condition where the body loses heat faster than it can produce, causing a dangerously low body temperature.

Hyperthermia

A medical condition characterized by an abnormally high body temperature due to failed thermoregulation.