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What Is It? #14

What Is It? #14

This lovely little diatom would make a great Christmas ornament, if only it were larger. It only measures about 25 micrometers (0.025 millimeters) on a side. Approximately how many of these little glass structures could we fit on the head of a pin (1.5 mm in diameter)?

A. 750

B. 6500

C. 75,000

D. 650,000

E. 6,575,000

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