All of the Following Pieces of Evidence Suggest That Animals

question 13

Multiple Choice

All of the following pieces of evidence suggest that animals existed prior to the Cambrian explosion EXCEPT:

• A) macroscopic fossils from the Ediacaran period, 570 mya
• B) microscopic fossils of multicellular organisms 2.1 bya
• C) biomarkers from sponges 635 mya
• D) molecular data showing the earliest matazoans appeared 700 mya

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Definitions:

Gastric Suction

A procedure to remove the contents of the stomach, often using a tube inserted through the nose or mouth, for various medical reasons.

Water-Soluble Lubricant

A lubricating substance that dissolves in water, often used medically to ease insertion of devices or during examinations.

Electrocardiogram

A test that records the electrical activity of the heart over a period of time, used to detect cardiac abnormalities.

T Waves

Components of an electrocardiogram (ECG) representing the repolarization of the ventricles in the heart.