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    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Lily stem. Light micrograph(LM) of section through part of lily (Lilium) stem. Thin outer epidermis surrounds layer of cortex. At center is pith, which contains numerous vascular bundles (yellow) — Stock Photo
    Lily stem. Light micrograph(LM) of section through part of lily (Lilium) stem. Thin outer epidermis surrounds layer of cortex. At center is pith, which contains numerous vascular bundles (yellow)
    Female scientist holding multi-well plate with growth medium. — Stock Photo
    Female scientist holding multi-well plate with growth medium.
    Human embryonic stem cell, digital illustration. — Stock Photo
    Human embryonic stem cell, digital illustration.
    Boy looking into microscope at table at home — Stock Photo
    Boy looking into microscope at table at home
    Male teacher helping girl student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Male teacher helping girl student using microscope, conducting scientific experiment in laboratory classroom
    Female teacher and girl student conducting scientific experiment at microscope in laboratory — Stock Photo
    Female teacher and girl student conducting scientific experiment at microscope in laboratory
    Side view of female with closed eyes enjoying sunny day on grassy meadow in countryside — Stock Photo
    Side view of female with closed eyes enjoying sunny day on grassy meadow in countryside
    Female science teacher wearing lab coat, rubber glove and goggles, writing at whiteboard in classroom — Stock Photo
    Female science teacher wearing lab coat, rubber glove and goggles, writing at whiteboard in classroom
    Composition made of old fashioned photo camera placed near dry autumn leaves and pomegranate — Stock Photo
    Composition made of old fashioned photo camera placed near dry autumn leaves and pomegranate
    Full frame shot of backlit green palm leaf — Stock Photo
    Full frame shot of backlit green palm leaf
    Student in wheelchair beside furnace fuel flow controls in HVAC classroom — Stock Photo
    Student in wheelchair beside furnace fuel flow controls in HVAC classroom
    Close up of Western sword ferns, Polystichum munitum. — Stock Photo
    Close up of Western sword ferns, Polystichum munitum.
    Dandelion seeds blowing in wind at summer day — Stock Photo
    Dandelion seeds blowing in wind at summer day
    Ceramic cup with fresh blooming flowers placed on wooden table in restaurant in daylight — Stock Photo
    Ceramic cup with fresh blooming flowers placed on wooden table in restaurant in daylight
    Computer programmers high-fiving at laptop in office — Stock Photo
    Computer programmers high-fiving at laptop in office
    Close up of blossom flowers in garden centre — Stock Photo
    Close up of blossom flowers in garden centre
    Tween girl looking into microscope with dog looking on — Stock Photo
    Tween girl looking into microscope with dog looking on
    Lavandula, X-ray, radiology scan — Stock Photo
    Lavandula, X-ray, radiology scan
    Bouquet of fresh flowers including roses and white lilies eustoma and aster in glass vase at sunshine — Stock Photo
    Bouquet of fresh flowers including roses and white lilies eustoma and aster in glass vase at sunshine
    Bowl of freshly picked peas — Stock Photo
    Bowl of freshly picked peas
    Close-up of furrow spider on tip of wild plant stem. — Stock Photo
    Close-up of furrow spider on tip of wild plant stem.
    Illustration of pink stem cell on blue background. — Stock Photo
    Illustration of pink stem cell on blue background.
    Girl looking at bug under microscope at kitchen table — Stock Photo
    Girl looking at bug under microscope at kitchen table
    Crop anonymous person touching plant twig with frost on thin leaves on blurred background — Stock Photo
    Crop anonymous person touching plant twig with frost on thin leaves on blurred background
    Student examining electrical control system on furnace with professor in HVAC classroom one student in wheelchair — Stock Photo
    Student examining electrical control system on furnace with professor in HVAC classroom one student in wheelchair
    Human embryonic stem cell on pin tip, conceptual digital artwork. — Stock Photo
    Human embryonic stem cell on pin tip, conceptual digital artwork.
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    Peony flower (Paeonia officinalis), X-ray. — Stock Photo
    Peony flower (Paeonia officinalis), X-ray.
    Close-up of technician storing stem cell samples in cryostorage. — Stock Photo
    Close-up of technician storing stem cell samples in cryostorage.
    Close-up shot of delicious Rainbow chard — Stock Photo
    Close-up shot of delicious Rainbow chard
    Overhead view of Glasses of red and white wine — Stock Photo
    Overhead view of Glasses of red and white wine
    Close-up of nursery web spider on squirting cucumber stem. — Stock Photo
    Close-up of nursery web spider on squirting cucumber stem.
    Student in wheelchair studying natural gas injector system on furnace with his classmate in HVAC classroom — Stock Photo
    Student in wheelchair studying natural gas injector system on furnace with his classmate in HVAC classroom
    Sincere child in gardening apron with watering pot and looking away against Alocasia in balcony while watering — Stock Photo
    Sincere child in gardening apron with watering pot and looking away against Alocasia in balcony while watering
    Male teacher helping girl student at microscope in laboratory classroom — Stock Photo
    Male teacher helping girl student at microscope in laboratory classroom
    Portrait confident students holding molecular structures in laboratory classroom — Stock Photo
    Portrait confident students holding molecular structures in laboratory classroom
    Girl students conducting scientific experiment in chemistry laboratory classroom — Stock Photo
    Girl students conducting scientific experiment in chemistry laboratory classroom
    Student who had Spinal Meningitis in a science lab — Stock Photo
    Student who had Spinal Meningitis in a science lab
    Boy student programming at computer in dark classroom — Stock Photo
    Boy student programming at computer in dark classroom
    Female science teacher and girl student writing at whiteboard in classroom — Stock Photo
    Female science teacher and girl student writing at whiteboard in classroom
    Junior high students using computers in computer lab — Stock Photo
    Junior high students using computers in computer lab
    Male teacher calling on students in classroom — Stock Photo
    Male teacher calling on students in classroom
    Technician checking stem cell cultures in bioengineering laboratory. — Stock Photo
    Technician checking stem cell cultures in bioengineering laboratory.
    Close up of tiger lily flowers in a garden, England, United Kingdom — Stock Photo
    Close up of tiger lily flowers in a garden, England, United Kingdom
    From above of red rose flower with dried leaves and petals placed on table in room — Stock Photo
    From above of red rose flower with dried leaves and petals placed on table in room
    Close-up of fleshy green leaves of Euphorbia plant on white background. — Stock Photo
    Close-up of fleshy green leaves of Euphorbia plant on white background.
    Top view of heap of raw asparagus stalks with uneven surface and wavy edges — Stock Photo
    Top view of heap of raw asparagus stalks with uneven surface and wavy edges
    Close-up of blossoming wildflowers in Purisim Creek Redwoods; California, United States of America — Stock Photo
    Close-up of blossoming wildflowers in Purisim Creek Redwoods; California, United States of America
    Red Wine Pouring into a Glass — Stock Photo
    Red Wine Pouring into a Glass
    Top view of pair of worn brown leather shoes placed on grassy lawn in nature — Stock Photo
    Top view of pair of worn brown leather shoes placed on grassy lawn in nature
    Woman standing in a garden holding a dahlia flower, Serbia — Stock Photo
    Woman standing in a garden holding a dahlia flower, Serbia
    Top view of row of green and ripe cherry tomatoes showing ripening stage on white gauze — Stock Photo
    Top view of row of green and ripe cherry tomatoes showing ripening stage on white gauze
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Beautiful freshly cut long twigs with green leaves and purple flowers standing in glass jar with water on round wooden table in old shabby room with mirrors — Stock Photo
    Beautiful freshly cut long twigs with green leaves and purple flowers standing in glass jar with water on round wooden table in old shabby room with mirrors
    From above of whole green and red cherry tomatoes in bowl collected in farm during harvest season — Stock Photo
    From above of whole green and red cherry tomatoes in bowl collected in farm during harvest season
    Scenery of hill covered with snow and bare shrubs growing in winter nature under cloudy sky — Stock Photo
    Scenery of hill covered with snow and bare shrubs growing in winter nature under cloudy sky
    Crop anonymous children at table with green seedling growing in carton cup with soil in house — Stock Photo
    Crop anonymous children at table with green seedling growing in carton cup with soil in house
    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
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.