One Type of Early Pre-Cell (Vesicle) Probably Consisted of Small

question 73

Multiple Choice

One type of early pre-cell (vesicle) probably consisted of small droplets of

• A) water
• B) clay
• C) concentrated amino acids
• D) nucleic acids

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Definitions:

T Wave

A component of the ECG that represents the repolarization, or recovery, of the ventricles during heartbeats.

Atrioventricular Valves

Valves located between the atria and ventricles of the heart that prevent the backflow of blood during contraction.

Semilunar Valves

Heart valves located at the exits of the right and left ventricles, preventing backflow of blood into the ventricles after contraction; they include the aortic and pulmonary valves.

Stethoscope

A medical instrument used for listening to the internal sounds of an organism, such as heart and lung sounds.