MANFRED KAGE / SCIENCE PHOTO LIBRARY MANFRED KAGE / SCIENCE PHOTO LIBRARY
Yeast. Scanning electron micrograph (SEM) of the unicellular yeast Saccharomyces cerevisiae, known as Baker's or Brewer's yeast. The larger cells are budding; new cells grow out from one end and pinch off leaving scars on both parent and daughter cell. With sufficient oxygen and nutrients cells may duplicate themselves about every two hours. Daughter cells begin producing buds before they are separated from their own parents. Yeasts have the ability to ferment sugars and in so doing produce alcohol and carbon dioxide. These properties are used in the production of wines, beers and in the baking of leavened bread. Magnification: x2420 at 6x7cm size green tint.
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