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    Scientists preparing blood sample for analysis under light microscope. — Stock Photo
    Scientists preparing blood sample for analysis under light microscope.
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Researchers handling stem cell cultures in laboratory while drug research. — Stock Photo
    Researchers handling stem cell cultures in laboratory while drug research.
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Scientist examining cultured cells under microscope. — Stock Photo
    Scientist examining cultured cells under microscope.
    Researcher handling stem cell cultures in laboratory during research. — Stock Photo
    Researcher handling stem cell cultures in laboratory during research.
    Technician working with cell samples in bioengineering laboratory. — Stock Photo
    Technician working with cell samples in bioengineering laboratory.
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Close-up illustration of pollen grain of mimosa and mimosa flowers. — Stock Photo
    Close-up illustration of pollen grain of mimosa and mimosa flowers.
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Doctor separating donor blood in blood bags into component parts. — Stock Photo
    Doctor separating donor blood in blood bags into component parts.
    Male scientist using computer. — Stock Photo
    Male scientist using computer.
    Coloured scanning electron micrograph (SEM) of immature dog sperm. — Stock Photo
    Coloured scanning electron micrograph (SEM) of immature dog sperm.
    Coloured scanning electron micrograph (SEM) of immature dog sperm. — Stock Photo
    Coloured scanning electron micrograph (SEM) of immature dog sperm.
    Seminiferous tubules and lending cells — Stock Photo
    Seminiferous tubules and lending cells
    Coloured scanning electron micrograph (SEM) of stubble on a man's face. — Stock Photo
    Coloured scanning electron micrograph (SEM) of stubble on a man's face.
    Duct is lined with pseudostratified epithelium — Stock Photo
    Duct is lined with pseudostratified epithelium
    Pollen grains of a common daisy — Stock Photo
    Pollen grains of a common daisy
    Pollen grains of a common daisy — Stock Photo
    Pollen grains of a common daisy
    Geranium pollen grain — Stock Photo
    Geranium pollen grain
    Clematis montana pollen — Stock Photo
    Clematis montana pollen
    Angel trumpets pollen — Stock Photo
    Angel trumpets pollen
    Aconite anther and pollen — Stock Photo
    Aconite anther and pollen
    Daffodil pollen structure and shape — Stock Photo
    Daffodil pollen structure and shape
    Geranium sp. pollen grain — Stock Photo
    Geranium sp. pollen grain
    Daisy pollen grain — Stock Photo
    Daisy pollen grain
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    Abutilon sp. pollen grain — Stock Photo
    Abutilon sp. pollen grain
    Primula pollen grain — Stock Photo
    Primula pollen grain
    Alstroemeria anther and pollen — Stock Photo
    Alstroemeria anther and pollen
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    Abutilon pollen grain — Stock Photo
    Abutilon pollen grain
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Strawberry pollen grain — Stock Photo
    Strawberry pollen grain
    Chinese hibiscus pollen — Stock Photo
    Chinese hibiscus pollen
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Bougainvillea pollen grain — Stock Photo
    Bougainvillea pollen grain
    Strawberry pollen grain — Stock Photo
    Strawberry pollen grain
    Sperm fertilising an egg — Stock Photo
    Sperm fertilising an egg
    Angel trumpets pollen grain — Stock Photo
    Angel trumpets pollen grain
    Chinese hibiscus pollen — Stock Photo
    Chinese hibiscus pollen
    Flowering currant pollen — Stock Photo
    Flowering currant pollen
    Milkwort pollen grain — Stock Photo
    Milkwort pollen grain
    Bougainvillea pollen grain — Stock Photo
    Bougainvillea pollen grain
    Artwork of human fertilization — Stock Photo
    Artwork of human fertilization
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Sperm fertilizing an egg cell — Stock Photo
    Sperm fertilizing an egg cell
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Milkwort pollen grain — Stock Photo
    Milkwort pollen grain
    Sperm fertilising an egg — Stock Photo
    Sperm fertilising an egg
    Sperm fertilising an egg — Stock Photo
    Sperm fertilising an egg
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower