Word: parameciaã
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...began his scientific career at the age of 12, when his father gave him a microscope and helped him set up a laboratory next to his bedroom. Their neighbor, a pathologist, gave him slides of organs preserved in formaldehyde, and Marshall says he discovered a method of breeding paramecia??single-celled organisms—in a mixture of grass, water, and cocoa powder.“My mother thought the protozoa would climb out and attack the house,” he says, but he assured her they couldn’t survive outside containment.Marshall never attended college...
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