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    Maize root. Light micrograph (LM) of section through root of maize plant (Zea mays) showing typical monocot arrangement of vascular bundles. central vascular cylinder is comprised of central cluster of parenchyma cells — Stock Photo
    Maize root. Light micrograph (LM) of section through root of maize plant (Zea mays) showing typical monocot arrangement of vascular bundles. central vascular cylinder is comprised of central cluster of parenchyma cells
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Student in wheelchair setting up generator experiment while student examines HVAC system — Stock Photo
    Student in wheelchair setting up generator experiment while student examines HVAC system
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Creeping plants shadow on window curtain — Stock Photo
    Creeping plants shadow on window curtain
    Sour cherry with stem and leaves — Stock Photo
    Sour cherry with stem and leaves
    Focused young ethnic female florist in casual clothes and apron cutting stems of fresh bright flowers with pruning snips in floral shop — Stock Photo
    Focused young ethnic female florist in casual clothes and apron cutting stems of fresh bright flowers with pruning snips in floral shop
    Close-up of technician storing stem cell samples in cryostorage. — Stock Photo
    Close-up of technician storing stem cell samples in cryostorage.
    A sprig of fresh lemon verbena — Stock Photo
    A sprig of fresh lemon verbena
    Passion Fruit Sorbet — Stock Photo
    Passion Fruit Sorbet
    Portrait of a wasp on a plant, Indonesia — Stock Photo
    Portrait of a wasp on a plant, Indonesia
    Male teacher and girl students conducting scientific experiment at microscope and laptop in laboratory classroom — Stock Photo
    Male teacher and girl students conducting scientific experiment at microscope and laptop in laboratory classroom
    Easter eggs in porcelain egg cartons with eucalyptus stems — Stock Photo
    Easter eggs in porcelain egg cartons with eucalyptus stems
    Female cell biologist placing flask containing stem cells cultivated in red growth medium under microscope. — Stock Photo
    Female cell biologist placing flask containing stem cells cultivated in red growth medium under microscope.
    Student in wheelchair studying natural gas fuel line on furnace in HVAC classroom — Stock Photo
    Student in wheelchair studying natural gas fuel line on furnace in HVAC classroom
    Bigleaf maple leaf (Acer macrophyllum) in autumn, in small tree branch — Stock Photo
    Bigleaf maple leaf (Acer macrophyllum) in autumn, in small tree branch
    Engineers with digital tablet programming robotic arm in office — Stock Photo
    Engineers with digital tablet programming robotic arm in office
    Closeup of green fern frond, background — Stock Photo
    Closeup of green fern frond, background
    Young attractive woman with fresh flower looking away and resting on bed in bedroom — Stock Photo
    Young attractive woman with fresh flower looking away and resting on bed in bedroom
    High palms covered with green foliage growing on glade in park of Safdarjung Mausoleum in New Delhi — Stock Photo
    High palms covered with green foliage growing on glade in park of Safdarjung Mausoleum in New Delhi
    High angle of lichen on tree branch among green branches in abundant forest — Stock Photo
    High angle of lichen on tree branch among green branches in abundant forest
    Person strolling on dry meadow against misty trees in nature in winter day — Stock Photo
    Person strolling on dry meadow against misty trees in nature in winter day
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    Computer programmers programming virtual reality simulator glasses in open plan office — Stock Photo
    Computer programmers programming virtual reality simulator glasses in open plan office
    A longan on stem on white background — Stock Photo
    A longan on stem on white background
    Top view of tender pink flower petal near aromatic rosemary sprigs on rugged surface with spots — Stock Photo
    Top view of tender pink flower petal near aromatic rosemary sprigs on rugged surface with spots
    Top view of various types of succulent plants placed in pots on wooden table in light place — Stock Photo
    Top view of various types of succulent plants placed in pots on wooden table in light place
    Female cell biologist examining flask containing stem cells cultivated in red growth medium. — Stock Photo
    Female cell biologist examining flask containing stem cells cultivated in red growth medium.
    Texture of dry fallen orange autumn leaf with thin veins and stem against blurred gray background — Stock Photo
    Texture of dry fallen orange autumn leaf with thin veins and stem against blurred gray background
    Human brain anatomy — Stock Photo
    Human brain anatomy
    Sour cherry with stem and leaves — Stock Photo
    Sour cherry with stem and leaves
    Blastocyst structure, conceptual computer artwork. — Stock Photo
    Blastocyst structure, conceptual computer artwork.
    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)
    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
    Tropical jungle Monstera leaf — Stock Photo
    Tropical jungle Monstera leaf
    Thin branch of oak tree with yellow withering leaves in center of dark room — Stock Photo
    Thin branch of oak tree with yellow withering leaves in center of dark room
    Woman checking plant in the garden — Stock Photo
    Woman checking plant in the garden
    Cropped image of female florist trimming flower stems at her flower shop — Stock Photo
    Cropped image of female florist trimming flower stems at her flower shop
    Crop anonymous female harvester collecting fresh tomatoes from plant near straw basket in countryside — Stock Photo
    Crop anonymous female harvester collecting fresh tomatoes from plant near straw basket in countryside
    Illustration of pink stem cell on blue background. — Stock Photo
    Illustration of pink stem cell on blue background.
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (grey) and large intercellular air spaces (holes). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (grey) and large intercellular air spaces (holes).
    Rhubarb stems and leaves arranged in a circular frame (top view) — Stock Photo
    Rhubarb stems and leaves arranged in a circular frame (top view)
    Lemon verbena spring with leaves, close up shot — Stock Photo
    Lemon verbena spring with leaves, close up shot
    Blooming red and white dahlia flowers — Stock Photo
    Blooming red and white dahlia flowers
    From above of crop positive young female working in garden and cutting squash plants with secateurs or gardening scissors — Stock Photo
    From above of crop positive young female working in garden and cutting squash plants with secateurs or gardening scissors
    Row of green and ripe cherry tomatoes showing ripening stage on white gauze — Stock Photo
    Row of green and ripe cherry tomatoes showing ripening stage on white gauze
    Beautiful hortensia flowers — Stock Photo
    Beautiful hortensia flowers
    Matsutake on tree stump — Stock Photo
    Matsutake on tree stump
    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
    Boy students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Boy students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    Thick trees with large overgrown roots growing in woodland near wooden footpath in early autumn day — Stock Photo
    Thick trees with large overgrown roots growing in woodland near wooden footpath in early autumn day
    Man working in a large greenhouse — Stock Photo
    Man working in a large greenhouse
    Creative businesswomen using adhesive notes and flow chart, planning in office — Stock Photo
    Creative businesswomen using adhesive notes and flow chart, planning in office
    Sunlit drop of water on stem — Stock Photo
    Sunlit drop of water on stem
    Portrait playful girl student holding molecular structure on head at microscope in laboratory classroom — Stock Photo
    Portrait playful girl student holding molecular structure on head at microscope in laboratory classroom
    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
    Close-up of furrow spider on tip of wild plant stem. — Stock Photo
    Close-up of furrow spider on tip of wild plant stem.
    Black and white closeup of dried plant sprigs with wavy stems on transparent aqua drips on blurred background — Stock Photo
    Black and white closeup of dried plant sprigs with wavy stems on transparent aqua drips on blurred background
    Smiling girl conducting scientific experiment in laboratory classroom — Stock Photo
    Smiling girl conducting scientific experiment in laboratory classroom
    Various pot plants on wooden table — Stock Photo
    Various pot plants on wooden table