Use the Following Figure to Answer the Question

question 11

Multiple Choice

Use the following figure to answer the question.

Consider the global nitrogen cycle depicted in the figure. What is the limiting portion of the cycle for plants?

• A) industrial nitrogen fixation
• B) nitrogen lost to the atmosphere
• C) internal nitrogen cycling in the oceans
• D) nitrogen fixation by bacteria

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Definitions:

Start/Stop Control

A control mechanism designed to initiate or halt a process, typically used in machinery, applications, or systems requiring user interaction to begin or end operations.

Motor Control

The process of starting, stopping, and regulating the speed and torque of an electric motor.

XIC

An acronym for "Examine if Closed," a command in Programmable Logic Controllers (PLCs) that checks if a specific input or condition is true.

Start Contact

A control element in circuits, often represented in schematics, that initiates the flow of electricity, starting a process or operation.