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The iris controls the amount of light entering the eye.
The part of the maintenance cycle the linux administrators spend the most time is monitoring system.
<h3>
What is monitoring system?</h3>
A system monitor is a hardware or software component used to monitor system resources and performance in a computer system.
This computer hardware can be used by administrators to monitor system resources and performance in a computer system.
Thus, the part of the maintenance cycle the linux administrators spend the most time is monitoring system.
Learn more about monitoring system here: brainly.com/question/25802316
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<span>The Calvin cycle, Calvin–Benson–Bassham (CBB) cycle, reductive pentose phosphate cycle or C3 cycle is a series of biochemical redox reactions that take place in the stroma of chloroplast in photosynthetic organisms. It is also known as the light-independent reactions.</span>