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    Quartz crystals structure — Stock Photo
    Quartz crystals structure
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells — Stock Photo
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells
    Triceratium sp. diatom algae — Stock Photo
    Triceratium sp. diatom algae
    Primula pollen grain — Stock Photo
    Primula pollen grain
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph. — Stock Photo
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph.
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Immature dog sperm — Stock Photo
    Immature dog sperm