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    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)
    Human embryonic stem cell, digital illustration. — Stock Photo
    Human embryonic stem cell, digital illustration.
    Scientist viewing sample on glass slide before light microscope. — Stock Photo
    Scientist viewing sample on glass slide before light microscope.
    Close-up of hands of female scientist working in laboratory with pipette and flask. — Stock Photo
    Close-up of hands of female scientist working in laboratory with pipette and flask.
    Beautiful Nordic drink in small high stem glass sprinkled with red powder and leaf served on grey cloth with scattered dried rose petals on blurred background — Stock Photo
    Beautiful Nordic drink in small high stem glass sprinkled with red powder and leaf served on grey cloth with scattered dried rose petals on blurred background
    Surprised, curious students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Surprised, curious students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Computer programmers programming virtual reality simulator glasses at computer in office — Stock Photo
    Computer programmers programming virtual reality simulator glasses at computer in office
    Closeup of delicate soft white stamen — Stock Photo
    Closeup of delicate soft white stamen
    Focused boy student reading textbook at microscope in laboratory classroom — Stock Photo
    Focused boy student reading textbook at microscope in laboratory classroom
    Crop male hand holding bunch of garlic against table — Stock Photo
    Crop male hand holding bunch of garlic against table
    Overhead view of bunch of whole tomatoes with pedicels on green background with painted waves — Stock Photo
    Overhead view of bunch of whole tomatoes with pedicels on green background with painted waves
    Iris stem cellular structure — Stock Photo
    Iris stem cellular structure
    Closeup view of Mexican style shrimp cocktail in glass stem bowl — Stock Photo
    Closeup view of Mexican style shrimp cocktail in glass stem bowl
    Eucalyptus branches with gift tags, string and scissors — Stock Photo
    Eucalyptus branches with gift tags, string and scissors
    Portrait of a wasp on a plant, Indonesia — Stock Photo
    Portrait of a wasp on a plant, Indonesia
    Close up of small gray lizard looking out of trunk in the forest — Stock Photo
    Close up of small gray lizard looking out of trunk in the forest
    Student in wheelchair studying furnace electronic control system in HVAC classroom — Stock Photo
    Student in wheelchair studying furnace electronic control system in HVAC classroom
    Close up of boy looking through a microscope at a bug — Stock Photo
    Close up of boy looking through a microscope at a bug
    Section through a peanut stem — Stock Photo
    Section through a peanut stem
    From above of festive Christmas bouquet with branches of cotton, fir and twigs of eucalyptus and bright red branches with berries placed on wooden table with candles in room — Stock Photo
    From above of festive Christmas bouquet with branches of cotton, fir and twigs of eucalyptus and bright red branches with berries placed on wooden table with candles in room
    Close-up of technician storing stem cell samples in cryostorage. — Stock Photo
    Close-up of technician storing stem cell samples in cryostorage.
    Close-up of single gentle twig in grassland — Stock Photo
    Close-up of single gentle twig in grassland
    Easter eggs in bird's nests with eucalyptus stems — Stock Photo
    Easter eggs in bird's nests with eucalyptus stems
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Closeup of tween girl looking at bug under microscope — Stock Photo
    Closeup of tween girl looking at bug under microscope
    Computer programmers testing virtual reality simulator glasses in office — Stock Photo
    Computer programmers testing virtual reality simulator glasses in office
    Still life of bunch of green garlic on table — Stock Photo
    Still life of bunch of green garlic on table
    Hands of female researcher using micropipette and tubes. — Stock Photo
    Hands of female researcher using micropipette and tubes.
    Curing green grasshopper sitting on delicate dark red plant leaf on blurred wild nature background — Stock Photo
    Curing green grasshopper sitting on delicate dark red plant leaf on blurred wild nature background
    Top view of blossoming lush bud of white lilies eustoma at daylight — Stock Photo
    Top view of blossoming lush bud of white lilies eustoma at daylight
    Light micrograph of Dicot plants stem showing plant vascular tissue. — Stock Photo
    Light micrograph of Dicot plants stem showing plant vascular tissue.
    Cerebellum and corpus callosum — Stock Photo
    Cerebellum and corpus callosum
    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
    Students examining liquids in test tube rack, conducting scientific experiment in laboratory classroom — Stock Photo
    Students examining liquids in test tube rack, conducting scientific experiment in laboratory classroom
    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
    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
    Laughing computer programmers testing virtual reality simulator glasses in office — Stock Photo
    Laughing computer programmers testing virtual reality simulator glasses in office
    Female scientist in clean suit with test tubes studying coronavirus — Stock Photo
    Female scientist in clean suit with test tubes studying coronavirus
    Scientist pipetting sample into growth medium in multiwell plate. — Stock Photo
    Scientist pipetting sample into growth medium in multiwell plate.
    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
    Girl students assembling computer in classroom — Stock Photo
    Girl students assembling computer in classroom
    Javan tree frog on a plant, Indonesia — Stock Photo
    Javan tree frog on a plant, Indonesia
    Close-up of chrysocrambus craterella moth on thin wild plant stem. — Stock Photo
    Close-up of chrysocrambus craterella moth on thin wild plant stem.
    Digital illustration of human cells on blue background. — Stock Photo
    Digital illustration of human cells on blue background.
    Students conducting scientific experiment, pouring liquid in beaker in laboratory classroom — Stock Photo
    Students conducting scientific experiment, pouring liquid in beaker in laboratory classroom
    Happy woman standing on field with red flowers in sunny day — Stock Photo
    Happy woman standing on field with red flowers in sunny day
    Back view of unrecognizable female with long ginger hair reaching hand to door of greenhouse with plants — Stock Photo
    Back view of unrecognizable female with long ginger hair reaching hand to door of greenhouse with plants
    Computer programmers testing virtual reality simulator glasses in office — Stock Photo
    Computer programmers testing virtual reality simulator glasses in office
    Three flying frogs sitting on a plant, closeup view — Stock Photo
    Three flying frogs sitting on a plant, closeup view
    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
    Focused boy student programming at computer in dark classroom — Stock Photo
    Focused boy student programming at computer in dark classroom
    Close-up of delicate white blossom of Snakes Head Fritillary on meadow. — Stock Photo
    Close-up of delicate white blossom of Snakes Head Fritillary on meadow.
    Small branch on tree — Stock Photo
    Small branch on tree
    Pieces of fresh green Aloe Vera on white background — Stock Photo
    Pieces of fresh green Aloe Vera on white background
    Cup of hot tea with honey, lemon and ginger next to eucalyptus stems in vase — Stock Photo
    Cup of hot tea with honey, lemon and ginger next to eucalyptus stems in vase
    Green and red haworthia plant with leaves and white dots in dark place — Stock Photo
    Green and red haworthia plant with leaves and white dots in dark place
    Instructor discussing air conditioner recharging with student in wheelchair in HVAC classroom — Stock Photo
    Instructor discussing air conditioner recharging with student in wheelchair in HVAC classroom
    Flower of Scabiosa plant on white background. — Stock Photo
    Flower of Scabiosa plant on white background.
    From above of prickly cacti with spiky stems growing in pots in botanical garden — Stock Photo
    From above of prickly cacti with spiky stems growing in pots in botanical garden
    Close-up of fungus infecting caterpillar on plant stem. — Stock Photo
    Close-up of fungus infecting caterpillar on plant stem.