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Electron micrographs of sections through a single excreted food vacuole loaded with spores, after 11 h of incubation. a, single spores; b, a germinating spore; c, chains of vegetative bacteria breaking out of the food vacuoles’ envelope; d, spore coat; e, intact ICP. (Note the inclusions of different densities in the crystal.) Magnifications, ×9,000 (A) and ×22,500 (B).
