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    Eupodiscus sculptus diatom — Stock Photo
    Eupodiscus sculptus diatom
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp.
    Sperm cell with multiple tails — Stock Photo
    Sperm cell with multiple tails
    Bacteriastrum sp. diatom algae — Stock Photo
    Bacteriastrum sp. diatom algae
    Triceratium sp. diatom algae — Stock Photo
    Triceratium sp. diatom algae
    Paramecium sp. ciliate protozoa — Stock Photo
    Paramecium sp. ciliate protozoa
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Paramecium sp. ciliate protozoa — Stock Photo
    Paramecium sp. ciliate protozoa
    Schizosaccharomyces pombe yeast — Stock Photo
    Schizosaccharomyces pombe yeast
    Coloured scanning electron micrograph (SEM) of a tumour cell, showing pseudopodia protrusions (bottom left and right), a prominent feature of actively motile cells. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a tumour cell, showing pseudopodia protrusions (bottom left and right), a prominent feature of actively motile cells.
    Colorectal cancer cell dividing — Stock Photo
    Colorectal cancer cell dividing
    Diatom eukaryotic algae — Stock Photo
    Diatom eukaryotic algae
    Campylobacter bacteria colony — Stock Photo
    Campylobacter bacteria colony
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Geranium pollen grain — Stock Photo
    Geranium pollen grain
    Primula pollen grain — Stock Photo
    Primula pollen grain
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Rutilaria epsilon diatom — Stock Photo
    Rutilaria epsilon diatom
    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.
    Campylobacter bacteria colony — Stock Photo
    Campylobacter bacteria colony
    Man talking on cell phone at roadside behind warning triangle — Stock Photo
    Man talking on cell phone at roadside behind warning triangle
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Marine planktonic unicellular alga — Stock Photo
    Marine planktonic unicellular alga
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Campylobacter bacteria colony — Stock Photo
    Campylobacter bacteria colony
    Enterococcus bacteria colony — Stock Photo
    Enterococcus bacteria colony
    Conceptual image of a neuron on black background — Stock Photo
    Conceptual image of a neuron on black background
    Cell culture plate on white background. — Stock Photo
    Cell culture plate on white background.
    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.
    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).
    Human sperm cell, coloured scanning electron micrograph (SEM). — Stock Photo
    Human sperm cell, coloured scanning electron micrograph (SEM).
    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
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Campylodiscus fastuosus diatom — Stock Photo
    Campylodiscus fastuosus diatom
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Conceptual image of polyomavirus cell — Stock Photo
    Conceptual image of polyomavirus cell
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    3d illustration of transparent and colourful protozoa. — Stock Photo
    3d illustration of transparent and colourful protozoa.
    Anthrax bacteria structure — Stock Photo
    Anthrax bacteria structure
    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans. — Stock Photo
    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans.
    Father checking smartphone while comforting sick daughter — Stock Photo
    Father checking smartphone while comforting sick daughter
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba. — Stock Photo
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba.
    Helicobacter pylori bacteria — Stock Photo
    Helicobacter pylori bacteria
    Ovarian cells section — Stock Photo
    Ovarian cells section
    Cancerous tumour visualisation — Stock Photo
    Cancerous tumour visualisation
    Deformed sperm cell — Stock Photo
    Deformed sperm cell
    Geranium sp. pollen grain — Stock Photo
    Geranium sp. pollen grain
    Visual rendering of Amoeba — Stock Photo
    Visual rendering of Amoeba
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Cell culture plate on white background. — Stock Photo
    Cell culture plate on white background.
    Campylobacter bacteria colony — Stock Photo
    Campylobacter bacteria colony
    Phytoplankton diatom Coscinodiscus sp — Stock Photo
    Phytoplankton diatom Coscinodiscus sp
    3d illustration of transparent and colorful protozoan on blue background. — Stock Photo
    3d illustration of transparent and colorful protozoan on blue background.
    Animal cell structure — Stock Photo
    Animal cell structure
    Conceptual image of a neuron on black background — Stock Photo
    Conceptual image of a neuron on black background