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    Arachnoidiscus sp. diatom algae — Stock Photo
    Arachnoidiscus sp. diatom algae
    Gram negative Calymmatobacterium sp. — Stock Photo
    Gram negative Calymmatobacterium sp.
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Abutilon sp. pollen grain — Stock Photo
    Abutilon sp. pollen grain
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Elementary age boy sitting on grass by bicycle and playing handheld electronic game. — Stock Photo
    Elementary age boy sitting on grass by bicycle and playing handheld electronic game.
    Multi-generation family using digital tablet outdoors — Stock Photo
    Multi-generation family using digital tablet outdoors
    Business people using digital tablet on sofa at home — Stock Photo
    Business people using digital tablet on sofa at home
    Brother and sister sharing digital tablet under sheet — Stock Photo
    Brother and sister sharing digital tablet under sheet
    Feline caliciviruses particles — Stock Photo
    Feline caliciviruses particles
    Colored scanning electron micrograph of surface of human fallopian tube with epithelium of columnar cells with cilia. — Stock Photo
    Colored scanning electron micrograph of surface of human fallopian tube with epithelium of columnar cells with cilia.
    Focused boy student assembling electronics in classroom — Stock Photo
    Focused boy student assembling electronics in classroom
    Senior man using digital tablet in kitchen — Stock Photo
    Senior man using digital tablet in kitchen
    Travelers with suitcases walking in airport concourse — Stock Photo
    Travelers with suitcases walking in airport concourse
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Relaxed woman reading electronic book at home — Stock Photo
    Relaxed woman reading electronic book at home
    Colored scanning electron micrograph image of tooth dentine, mineralised connective tissue found under tooth enamel. — Stock Photo
    Colored scanning electron micrograph image of tooth dentine, mineralised connective tissue found under tooth enamel.
    Quartz crystals structure — Stock Photo
    Quartz crystals structure
    Caterpillar hairs. Coloured scanning electron micrograph (SEM) of hairs from the vapourer moth (Orgyia antiqua) caterpillar. — Stock Photo
    Caterpillar hairs. Coloured scanning electron micrograph (SEM) of hairs from the vapourer moth (Orgyia antiqua) caterpillar.
    Coloured scanning electron micrograph (SEM) of a sectioned artery containing red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a sectioned artery containing red blood cells (erythrocytes, red).
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is blue. Mitochondria (cyan)) in the cell's cytoplasm produce energy for the cell. Lysosomes (red) contain enzymes for digesting foreign particles. M — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is blue. Mitochondria (cyan)) in the cell's cytoplasm produce energy for the cell. Lysosomes (red) contain enzymes for digesting foreign particles. M
    Freshwater single diatom — Stock Photo
    Freshwater single diatom