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    Puffball fungus spore — Stock Photo
    Puffball fungus spore
    Computer Illustration of a fat cell structure — Stock Photo
    Computer Illustration of a fat cell structure
    Geranium sp. pollen grain — Stock Photo
    Geranium sp. pollen grain
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Male sex cell — Stock Photo
    Male sex cell
    Entamoeba gingivalis parasitic pathogen single-celled protozoan, amoeba in oral cavity, digital illustration. — Stock Photo
    Entamoeba gingivalis parasitic pathogen single-celled protozoan, amoeba in oral cavity, digital illustration.
    3d rendering of a virus — Stock Photo
    3d rendering of a virus
    Human sperm cell, coloured scanning electron micrograph (SEM). — Stock Photo
    Human sperm cell, coloured scanning electron micrograph (SEM).
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Differential interference contrast light micrograph of different species of fossil unicellular radiolarians (protozoa). — Stock Photo
    Differential interference contrast light micrograph of different species of fossil unicellular radiolarians (protozoa).
    Conceptual image of coxsackievirus cell — Stock Photo
    Conceptual image of coxsackievirus cell
    Male sex cell — Stock Photo
    Male sex cell
    Abutilon sp. pollen grain — Stock Photo
    Abutilon sp. pollen grain
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Eupodiscus sculptus diatom — Stock Photo
    Eupodiscus sculptus diatom
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand.
    Bacteriastrum sp. diatom algae — Stock Photo
    Bacteriastrum sp. diatom algae
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Conceptual image of polyomavirus cell — Stock Photo
    Conceptual image of polyomavirus cell
    Marine planktonic unicellular alga — Stock Photo
    Marine planktonic unicellular alga
    Hands of scientist using pipette and petri dish — Stock Photo
    Hands of scientist using pipette and petri dish
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba. — Stock Photo
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba.
    Uneven surface and cytoplasmic projections — Stock Photo
    Uneven surface and cytoplasmic projections
    Sperm cell in a fallopian tube — Stock Photo
    Sperm cell in a fallopian tube
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand.
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Campylobacter bacteria colony — Stock Photo
    Campylobacter bacteria colony
    3d illustration of transparent and colourful protozoa. — Stock Photo
    3d illustration of transparent and colourful protozoa.
    Crenated red blood cells — Stock Photo
    Crenated red blood cells
    Phytoplankton diatom Coscinodiscus sp — Stock Photo
    Phytoplankton diatom Coscinodiscus sp
    Single abstract bacterium on black background, computer illustration. — Stock Photo
    Single abstract bacterium on black background, computer illustration.
    Sperm cell with multiple tails — Stock Photo
    Sperm cell with multiple tails
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Campylobacter bacteria colony — Stock Photo
    Campylobacter bacteria colony
    Deformed sperm cell — Stock Photo
    Deformed sperm cell
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Ovarian cells section — Stock Photo
    Ovarian cells section
    Campylodiscus fastuosus diatom — Stock Photo
    Campylodiscus fastuosus diatom
    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
    Father with baby packing bag for work — Stock Photo
    Father with baby packing bag for work
    Rod-shaped Anthrax bacteria — Stock Photo
    Rod-shaped Anthrax bacteria
    Chlamydia bacteria, illustration — Stock Photo
    Chlamydia bacteria, illustration