The First Cells Appeared About ___ Billion Years Ago

question 13

Multiple Choice

The first cells appeared about ___ billion years ago.

• A)5
• B)4
• C)3.5
• D)2
• E)1.5

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Definitions:

Responsiveness

The ability of an organism or a system to react to changes in its environment or within itself.

Shiver

An involuntary response to cold involving rapid, rhythmic muscle contractions to generate heat.

Freezing Rain

Rain that falls as liquid but freezes upon contact with cold surfaces, forming a coating of ice.

Operations Function

Operations function involves the management of processes and systems within an organization that produce goods or services efficiently and effectively.