The Most Conclusive Evidence That Viruses Cause Cancers Is Provided

question 19

Multiple Choice

The most conclusive evidence that viruses cause cancers is provided by

• A) cancer following injection of cell- free filtrates.
• B) finding oncogenes in viruses.
• C) some liver cancer patients having had hepatitis.
• D) treating cancer with antibodies.
• E) the presence of antibodies against viruses in cancer patients.

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Definitions:

Electromagnetic Waves

Waves of energy that are propagated through the vacuum of outer space; they consist of oscillating electric and magnetic fields.

Blue-Violet

A color in the spectrum visible to the human eye, located between blue and violet wavelengths.

Hue

The dimension of color that is determined by the wavelength of light; what we know as the color names blue, green, and so forth.

Brightness

A perception attribute of visual experience in which a source appears to emit or reflect a high level of light.