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from article Regolith
Diagram showing the components of residual regolith.
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from article Bacteria
Illustration of a bacterium, with labeled structures. (Copyright © McGraw-Hill Education)
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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)
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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 Climate history
Plot of the average temperature for the contiguous United States during the month of August from 1895 to 2016. (Credit: NOAA)
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from article Climate history
Global temperature relative to peak Holocene temperature, based on ocean cores. (Credit: NASA)
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from article Paramecium
Photomicrograph of Paramecium caudatum. (Credit: Nancy Nehring/Getty Images)
