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from article Bacteria
Illustration of a bacterium, with labeled structures. (Copyright © McGraw-Hill Education)
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Image
from article Bacteria
Scanning electron micrograph of two rod-shaped bacilli of Klebsiella pneumoniae (colorized red), which can cause pneumonia and bloodstream infections. (Credit: David Dorward/National Institute of Allergy and Infectious Diseases)
Image
from article Bacteria
Photomicrograph showing endospore staining of Bacillus megaterium using the Schaeffer–Fulton technique. Endospores, free spores, and vegetative cells are indicated. (Credit: Lisa Burgess; copyright © McGraw-Hill Education)
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from article Bacteria
Scanning electron micrograph of spheroid-shaped methicillin-resistant Staphylococcus aureus (MRSA) bacteria (colorized yellow) surrounded by cellular debris (colorized orange). (Credit: National Institute of Allergy and Infectious Diseases)
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from article Mast cells
Mast cells purified from mouse peritoneal cavity and stained with Giemsa exhibit cytoplasmic granules.
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from article Mast cells
Mast cell activation. (a) Multiple stimuli can activate mast cells. (b) Activated mast cells produce mediators and proteins that can influence the outcome of an immune response or its associated tissue changes.
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from article Animal virus
Electron micrograph of negatively stained, purified bovine papilloma virions with icosahedral symmetry. (Credit: David Hill and John P. Sundberg)
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from article Animal virus
Electron micrograph of a thin section of chicken cells containing crystalline inclusion bodies formed by an avian reovirus during infection. (Credit: David Hill and John P. Sundberg)
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from article Paramecium
Photomicrograph of Paramecium caudatum. (Credit: Nancy Nehring/Getty Images)
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from article Nucleosome
Electron micrograph of chicken erythrocyte chromatin. The arrows mark individual nucleosomes in ribbonlike zigzag chromatin filaments. (From D. E. Olins and A. L. Olins, Nucleosomes: The structural quantum in chromosomes, Amer. Sci., 66:704–711,…
