Industry Analysts Estimate That the Number of E-Mail Mailboxes Worldwide

question 355

Multiple Choice

Industry analysts estimate that the number of e-mail mailboxes worldwide will grow to __________ by 2014.

• A) 2.1 billion
• B) 2.5 billion
• C) 3.1 billion
• D) 3.5 billion
• E) 4.1 billion

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Definitions:

Somatic Cell

A cell in a living being that is not involved in reproduction.

Kidney Cell

A type of cell found in the kidney that performs functions such as filtration, reabsorption, secretion, and excretion to regulate body fluids and electrolytes.

Sister Chromatids

The two identical DNA molecules of a duplicated eukaryotic chromosome, attached at the centromere.

Chromosome

A structure that consists of DNA together with associated proteins; carries part or all of a cell’s genetic information.