How Many Previous, Well-Documented Mass Extinctions Have Occurred in Earth's

question 30

Multiple Choice

How many previous, well-documented mass extinctions have occurred in Earth's history?

• A) one
• B) three
• C) five
• D) nine

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Definitions:

20 To 30 Ampere

A range of electrical current magnitudes typically used to specify the capability of electrical components or circuits.

I/O Modules

Input/Output (I/O) Modules are components of a control system that provide interfaces for inputting data to and outputting data from a processor.

Unauthorized Personnel

Individuals who do not have permission or clearance to access a certain area, information, or equipment.

I/O Rack

A physical framework used to organize and protect input/output modules and other control components in an automated system.