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    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Triceratium sp. diatom algae — Stock Photo
    Triceratium sp. diatom algae
    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.
    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.
    Triceratium sp. diatom algae — Stock Photo
    Triceratium sp. diatom algae
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Single abstract bacterium on black background, computer illustration. — Stock Photo
    Single abstract bacterium on black background, computer illustration.
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba. — Stock Photo
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba.
    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.
    Uneven surface and cytoplasmic projections — Stock Photo
    Uneven surface and cytoplasmic projections
    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.
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba. — Stock Photo
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba.
    3d rendering of a virus — Stock Photo
    3d rendering of a virus
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Colorectal cancer cell dividing — Stock Photo
    Colorectal cancer cell dividing
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Bacteriastrum sp. diatom algae — Stock Photo
    Bacteriastrum sp. diatom algae
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    Fertilization showing sperm fertilizing an egg — Stock Photo
    Fertilization showing sperm fertilizing an egg
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is red. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (black) contain enzymes for digesting foreign particles. — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is red. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (black) contain enzymes for digesting foreign particles.
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Computer Illustration of a fat cell structure — Stock Photo
    Computer Illustration of a fat cell structure
    3d illustration of red colored protozoan microorganism. — Stock Photo
    3d illustration of red colored protozoan microorganism.
    Helicobacter pylori bacteria — Stock Photo
    Helicobacter pylori bacteria
    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.
    3d illustration of transparent and colourful protozoa. — Stock Photo
    3d illustration of transparent and colourful protozoa.
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Rod-shaped Anthrax bacteria — Stock Photo
    Rod-shaped Anthrax bacteria
    Diatom eukaryotic algae — Stock Photo
    Diatom eukaryotic algae
    Ovarian cells section — Stock Photo
    Ovarian cells section
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is brown. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (blue) contain enzymes for digesting foreign particles — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is brown. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (blue) contain enzymes for digesting foreign particles
    Conceptual image of a neuron on black background — Stock Photo
    Conceptual image of a neuron on black background
    Geranium sp. pollen grain — Stock Photo
    Geranium sp. pollen grain
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Chlamydia bacteria, illustration — Stock Photo
    Chlamydia bacteria, illustration
    Cell culture plate on white background. — Stock Photo
    Cell culture plate on white background.
    3d illustration of transparent and colorful protozoan on blue background. — Stock Photo
    3d illustration of transparent and colorful protozoan on blue background.
    Colored scanning electron micrograph of pollen grain cell from hollyhock hibiscus flower. — Stock Photo
    Colored scanning electron micrograph of pollen grain cell from hollyhock hibiscus flower.
    Chlamydia bacteria, illustration — Stock Photo
    Chlamydia bacteria, illustration
    Chlamydia bacteria, illustration — Stock Photo
    Chlamydia bacteria, illustration
    Father with baby packing bag for work — Stock Photo
    Father with baby packing bag for work
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    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.
    Human sperm cell, coloured scanning electron micrograph (SEM). — Stock Photo
    Human sperm cell, coloured scanning electron micrograph (SEM).
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Deformed sperm cell — Stock Photo
    Deformed sperm cell
    Sperm cell in a fallopian tube — Stock Photo
    Sperm cell in a fallopian tube
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Male sex cell — Stock Photo
    Male sex cell
    Colored scanning electron micrograph of white blood cells and single platelet. — Stock Photo
    Colored scanning electron micrograph of white blood cells and single platelet.
    Enterococcus bacteria colony — Stock Photo
    Enterococcus bacteria colony
    Father checking smartphone while comforting sick daughter — Stock Photo
    Father checking smartphone while comforting sick daughter
    Cancer cell characteristic — Stock Photo
    Cancer cell characteristic