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    Abstract computer illustration of RNA polymerase transcribing DNA to messenger RNA mRNA. — Stock Photo
    Abstract computer illustration of RNA polymerase transcribing DNA to messenger RNA mRNA.
    3d rendered illustration of purple nerve cell. — Stock Photo
    3d rendered illustration of purple nerve cell.
    Light micrograph of onion (Allium cepa) root tip cells undergoing mitosis (nuclear division). — Stock Photo
    Light micrograph of onion (Allium cepa) root tip cells undergoing mitosis (nuclear division).
    Onion cells undergoing mitosis — Stock Photo
    Onion cells undergoing mitosis
    3d rendered illustration of human nerve cell on blue background. — Stock Photo
    3d rendered illustration of human nerve cell on blue background.
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Caudate nuclei highlighted in the human brain, illustration. The caudate nucleus is a component of the basal ganglia, it is associated with motor processes and plays role in Huntington's and Parkinson's diseases. — Stock Photo
    Caudate nuclei highlighted in the human brain, illustration. The caudate nucleus is a component of the basal ganglia, it is associated with motor processes and plays role in Huntington's and Parkinson's diseases.
    DNA (deoxyribonucleic acid) transcription, computer illustration. — Stock Photo
    DNA (deoxyribonucleic acid) transcription, computer illustration.
    Animal cell during cytokinesis (cell division), illustration. — Stock Photo
    Animal cell during cytokinesis (cell division), illustration.
    Illustration of human nervous receptors on black background. — Stock Photo
    Illustration of human nervous receptors on black background.
    Blue colored nerve cell on dark background, digital illustration. — Stock Photo
    Blue colored nerve cell on dark background, digital illustration.
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration. — Stock Photo
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration.
    Illustration of blue cancer cell on blue background. — Stock Photo
    Illustration of blue cancer cell on blue background.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Magnified digital illustration of mast cell. — Stock Photo
    Magnified digital illustration of mast cell.
    Nerve cell with pink colored axon on blue background, digital illustration. — Stock Photo
    Nerve cell with pink colored axon on blue background, digital illustration.
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs — Stock Photo
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs
    Fractured pancreas tissue — Stock Photo
    Fractured pancreas tissue
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs — Stock Photo
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs
    Genetic engineering, illustration. Synthetic small-ribonucleic acid (sRNA) being injected (needle tip at upper right) into the cell cytoplasm as part of a process of genetic engineering — Stock Photo
    Genetic engineering, illustration. Synthetic small-ribonucleic acid (sRNA) being injected (needle tip at upper right) into the cell cytoplasm as part of a process of genetic engineering
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria. — Stock Photo
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria.
    Animal cells with mitochondria, digital illustration. — Stock Photo
    Animal cells with mitochondria, digital illustration.
    Medical illustration of human cell structure on white background. — Stock Photo
    Medical illustration of human cell structure on white background.
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell. — Stock Photo
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell.
    Medical illustration of human cell structure on white background. — Stock Photo
    Medical illustration of human cell structure on white background.
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria. — Stock Photo
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria.
    Neutrophil white blood cell in blood, digital artwork. — Stock Photo
    Neutrophil white blood cell in blood, digital artwork.
    Human brain cross-section — Stock Photo
    Human brain cross-section
    Digital 3d colored illustration of cancer cell in process of mitosis. — Stock Photo
    Digital 3d colored illustration of cancer cell in process of mitosis.
    Scientific illustration of influenza virus particle. — Stock Photo
    Scientific illustration of influenza virus particle.
    3d rendered illustration of purple nerve cell. — Stock Photo
    3d rendered illustration of purple nerve cell.
    Blue colored nerve cell on white background, digital illustration. — Stock Photo
    Blue colored nerve cell on white background, digital illustration.
    Structure of cellular organelles — Stock Photo
    Structure of cellular organelles
    Caudate nuclei highlighted in the human brain, illustration. The caudate nucleus is a component of the basal ganglia, it is associated with motor processes and plays role in Huntington's and Parkinson's diseases. — Stock Photo
    Caudate nuclei highlighted in the human brain, illustration. The caudate nucleus is a component of the basal ganglia, it is associated with motor processes and plays role in Huntington's and Parkinson's diseases.
    Transparent cells on purple background, digital illustration. — Stock Photo
    Transparent cells on purple background, digital illustration.
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Digital illustration of human nerve cell with dendrites. — Stock Photo
    Digital illustration of human nerve cell with dendrites.
    Embryonic stem cells, illustration. — Stock Photo
    Embryonic stem cells, illustration.
    Structure of animal cell — Stock Photo
    Structure of animal cell
    Pink colored nerve cell on white background, digital illustration. — Stock Photo
    Pink colored nerve cell on white background, digital illustration.
    Abstract artwork of human nerve cell structure. — Stock Photo
    Abstract artwork of human nerve cell structure.
    Cancer cell, scientific digital illustration. — Stock Photo
    Cancer cell, scientific digital illustration.
    Medical illustration of human cell structure on white background. — Stock Photo
    Medical illustration of human cell structure on white background.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Digital illustration of human cells on blue background. — Stock Photo
    Digital illustration of human cells on blue background.
    Illustration of synapse structure in cross section. — Stock Photo
    Illustration of synapse structure in cross section.
    Nerve cell with many dendrites on blue background, digital illustration. — Stock Photo
    Nerve cell with many dendrites on blue background, digital illustration.
    Animal cell with mitochondria, digital illustration. — Stock Photo
    Animal cell with mitochondria, digital illustration.
    Transparent cells on white background, digital illustration. — Stock Photo
    Transparent cells on white background, digital illustration.
    Red colored nerve cell on dark background, digital illustration. — Stock Photo
    Red colored nerve cell on dark background, digital illustration.
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell. — Stock Photo
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell.
    Skeletal muscle structure — Stock Photo
    Skeletal muscle structure
    Illustration of transparent stem cell on blue background. — Stock Photo
    Illustration of transparent stem cell on blue background.
    Atomic structure, computer illustration — Stock Photo
    Atomic structure, computer illustration
    Magnified digital illustration of morula cells. — Stock Photo
    Magnified digital illustration of morula cells.
    Pink colored nerve cell on dark background, digital illustration. — Stock Photo
    Pink colored nerve cell on dark background, digital illustration.
    Abstract colored illustration of human nerve cell on light background. — Stock Photo
    Abstract colored illustration of human nerve cell on light background.