Terrestrial Radiation Includes Which of the Following Sources

question 15

Multiple Choice

Terrestrial radiation includes which of the following sources?

• A)Long-lived radioactive elements such as uranium-238,radium-226,and thorium-232 that are present in variable quantities in the crust of the earth
• B)Radioactive fallout from nuclear weapons tests in which detonation occurred above ground
• C)The sun and other stars
• D)Video display terminals and television receivers

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Definitions:

Centriole Pair

A pair of small, cylindrical structures that play a role in cell division in animal cells.

Protein Synthesis

The process by which cells build proteins, consisting of transcription in the nucleus and translation in the cytoplasm.

Cell Cycle

The series of events that take place in a cell leading to its growth, replication, and division into two daughter cells.

Cytosol

The aqueous component of the cytoplasm within a cell, where organelles are suspended and various cellular processes occur.