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    Scientists preparing blood sample for analysis under light microscope. — Stock Photo
    Scientists preparing blood sample for analysis under light microscope.
    Digital illustration of human cells on blue background. — Stock Photo
    Digital illustration of human cells on blue background.
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow).
    Raw buna shimeji with curved stems and rounded white caps on rugged gray surface — Stock Photo
    Raw buna shimeji with curved stems and rounded white caps on rugged gray surface
    Plant vascular tissue, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Plant vascular tissue, light micrograph. Haematoxylin and eosin stain.
    Human embryonic stem cell, digital illustration. — Stock Photo
    Human embryonic stem cell, digital illustration.
    Computer programmers programming virtual reality simulator glasses in open plan office — Stock Photo
    Computer programmers programming virtual reality simulator glasses in open plan office
    Female scientist in hijab and face mask using centrifuge in laboratory — Stock Photo
    Female scientist in hijab and face mask using centrifuge in laboratory
    A macro shot of green colorful parakeet feathers, bird anatomy — Stock Photo
    A macro shot of green colorful parakeet feathers, bird anatomy
    Cold orange juice — Stock Photo
    Cold orange juice
    Bright sunbeams shining through tree on field under clear blue sky — Stock Photo
    Bright sunbeams shining through tree on field under clear blue sky
    Bouquet of fresh flowers including white lilies eustoma and aster in glass vase at sunshine — Stock Photo
    Bouquet of fresh flowers including white lilies eustoma and aster in glass vase at sunshine
    Lime Martini in Fun Stem Glass — Stock Photo
    Lime Martini in Fun Stem Glass
    Scientist preparing cells in multiwell plate. — Stock Photo
    Scientist preparing cells in multiwell plate.
    Happy woman standing on field with red flowers in sunny day — Stock Photo
    Happy woman standing on field with red flowers in sunny day
    Male junior high teacher leading lesson at projection screen in classroom — Stock Photo
    Male junior high teacher leading lesson at projection screen in classroom
    Sensual girl in white dress touching stem with leaves — Stock Photo
    Sensual girl in white dress touching stem with leaves
    Pouring orange juice — Stock Photo
    Pouring orange juice
    Yellow blooming branches and stems making frame on orange background — Stock Photo
    Yellow blooming branches and stems making frame on orange background
    Western sword fern — Stock Photo
    Western sword fern
    Stem cell cultures on weighed in laboratory. — Stock Photo
    Stem cell cultures on weighed in laboratory.
    Businesswoman reviewing adhesive notes and flow chart, planning in office — Stock Photo
    Businesswoman reviewing adhesive notes and flow chart, planning in office
    A gardener holding a sieve with fresh chard — Stock Photo
    A gardener holding a sieve with fresh chard
    High angle of bowl with fresh cherry tomatoes near rosemary stems and whole onion on wooden table — Stock Photo
    High angle of bowl with fresh cherry tomatoes near rosemary stems and whole onion on wooden table
    Male teacher calling on students in classroom — Stock Photo
    Male teacher calling on students in classroom
    Spotlight on theater performer taking curtain call — Stock Photo
    Spotlight on theater performer taking curtain call
    Lemon on stem with leaves — Stock Photo
    Lemon on stem with leaves
    Shovel with soil against eco cups with growing seedlings in plastic container on table — Stock Photo
    Shovel with soil against eco cups with growing seedlings in plastic container on table
    Rustic wooden box with glass vases and plants — Stock Photo
    Rustic wooden box with glass vases and plants
    Fresh longans on stem — Stock Photo
    Fresh longans on stem
    Human embryonic stem cell on pin tip, conceptual digital artwork. — Stock Photo
    Human embryonic stem cell on pin tip, conceptual digital artwork.
    Scientist pipetting sample into growth medium in multiwell plate. — Stock Photo
    Scientist pipetting sample into growth medium in multiwell plate.
    Fresh chard (seen from above) — Stock Photo
    Fresh chard (seen from above)
    Close-up of nursery web spider on squirting cucumber stem. — Stock Photo
    Close-up of nursery web spider on squirting cucumber stem.
    Papilio butterfly with spread wings sitting on plant stem against blurred background — Stock Photo
    Papilio butterfly with spread wings sitting on plant stem against blurred background
    Male junior high teacher helping boy student using computer in computer lab — Stock Photo
    Male junior high teacher helping boy student using computer in computer lab
    Scenic view of Agave flower stalk, Sedona, Arizona, America, USA — Stock Photo
    Scenic view of Agave flower stalk, Sedona, Arizona, America, USA
    Branches in a vase with a candle on a sideboard table — Stock Photo
    Branches in a vase with a candle on a sideboard table
    Male science teacher and students laughing, conducting scientific experiment in laboratory classroom — Stock Photo
    Male science teacher and students laughing, conducting scientific experiment in laboratory classroom
    Junior high students at computers watching teacher at projection screen in classroom — Stock Photo
    Junior high students at computers watching teacher at projection screen in classroom
    Junior high students at computers watching teacher at projection screen in classroom — Stock Photo
    Junior high students at computers watching teacher at projection screen in classroom
    Exotic hummingbird sitting on twig on blurred background — Stock Photo
    Exotic hummingbird sitting on twig on blurred background
    Close-up of bee fly hanging on wildflower stem. — Stock Photo
    Close-up of bee fly hanging on wildflower stem.
    Row of elegant shiny glasses standing on wooden table in wine cellar with wine bottles on shelves on background — Stock Photo
    Row of elegant shiny glasses standing on wooden table in wine cellar with wine bottles on shelves on background
    Leaf hopper sitting on green fresh stem. — Stock Photo
    Leaf hopper sitting on green fresh stem.
    Back view full body of anonymous female with raised hand carrying wicker basket between blooming trees in garden — Stock Photo
    Back view full body of anonymous female with raised hand carrying wicker basket between blooming trees in garden
    Instructor training students about air conditioning units in HVAC classroom — Stock Photo
    Instructor training students about air conditioning units in HVAC classroom
    Hand holding stem of plant. — Stock Photo
    Hand holding stem of plant.
    Close-up of technician storing stem cell samples in cryostorage. — Stock Photo
    Close-up of technician storing stem cell samples in cryostorage.
    Mid section of female florist cutting flower stem with scissors — Stock Photo
    Mid section of female florist cutting flower stem with scissors
    Girl student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student using microscope, conducting scientific experiment in laboratory classroom
    Human brain anatomy — Stock Photo
    Human brain anatomy
    Allium flower, X-ray. — Stock Photo
    Allium flower, X-ray.
    Illustration of beige stem cell on black background. — Stock Photo
    Illustration of beige stem cell on black background.
    Boy student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Boy student using microscope, conducting scientific experiment in laboratory classroom
    Crop unrecognizable ethnic female touching blossoming sunflower with pleasant aroma and gentle petals in countryside — Stock Photo
    Crop unrecognizable ethnic female touching blossoming sunflower with pleasant aroma and gentle petals in countryside
    Woody stem section. Coloured scanning electron micrograph (SEM) of a transverse section through the stem of a woody plant. The majority of tissue seen here is secondary xylem (dark brown) — Stock Photo
    Woody stem section. Coloured scanning electron micrograph (SEM) of a transverse section through the stem of a woody plant. The majority of tissue seen here is secondary xylem (dark brown)
    High angle of indigo milk cap edible mushroom growing on ground covered with dry leaves in autumn forest — Stock Photo
    High angle of indigo milk cap edible mushroom growing on ground covered with dry leaves in autumn forest
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Boy student programming at computer in dark classroom — Stock Photo
    Boy student programming at computer in dark classroom