What is structure 3 , and how does it help sustain life? A. Structure 3 is a mitochondrion, which is the site of cellular respiration Structure 3 is a chloroplast , which is the site of photosynthesis . C. Structure 3 is the cell wall , which gives the cell structural support . Structure 3 is the nucleus , which is the control center of the cell .

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.

condenser is used to focus in the light microscope.

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