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    Colored scanning electron micrograph of human mesenchymal stem cell. — Stock Photo
    Colored scanning electron micrograph of human mesenchymal stem cell.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    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.
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (blue) and large intercellular air spaces (holes). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (blue) and large intercellular air spaces (holes).
    Curious girl student holding molecule model in classroom — Stock Photo
    Curious girl student holding molecule model in classroom
    Portrait confident female engineers with prototype and robotic arm in office — Stock Photo
    Portrait confident female engineers with prototype and robotic arm in office
    Branch of a drying plant;Yelapa jalisco mexico — Stock Photo
    Branch of a drying plant;Yelapa jalisco mexico
    Biology laboratory scientist hands working with cell culture in flask. — Stock Photo
    Biology laboratory scientist hands working with cell culture in flask.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Green thin trunks of high trees growing together in grove — Stock Photo
    Green thin trunks of high trees growing together in grove
    Artichoke flower head — Stock Photo
    Artichoke flower head
    Junior high students using computers in computer lab — Stock Photo
    Junior high students using computers in computer lab
    Student in wheelchair taking notes while reading textbook in HVAC classroom — Stock Photo
    Student in wheelchair taking notes while reading textbook in HVAC classroom
    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
    Close up pipettes and specimen holder in science laboratory — Stock Photo
    Close up pipettes and specimen holder in science laboratory
    Empty white frame hanging on bright dyed green exotic plants in daylight — Stock Photo
    Empty white frame hanging on bright dyed green exotic plants in daylight
    Smiling boy student assembling DNA model in classroom — Stock Photo
    Smiling boy student assembling DNA model in classroom
    Willow twigs with silvery catkins, close-up. — Stock Photo
    Willow twigs with silvery catkins, close-up.
    Field harvesting on the fields — Stock Photo
    Field harvesting on the fields
    Smiling female chemistry teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Smiling female chemistry teacher and students conducting scientific experiment in laboratory classroom
    Instructor discussing condenser coil on refrigeration unit with student in wheelchair — Stock Photo
    Instructor discussing condenser coil on refrigeration unit with student in wheelchair
    Girl at rapeseed field — Stock Photo
    Girl at rapeseed field
    Computer programmers testing virtual reality simulator glasses in open plan office — Stock Photo
    Computer programmers testing virtual reality simulator glasses in open plan office
    Medical illustration of the human nervous system and brain — Stock Photo
    Medical illustration of the human nervous system and brain
    Fresh organic purple cabbage on wood background. — Stock Photo
    Fresh organic purple cabbage on wood background.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Designers working in open plan office — Stock Photo
    Designers working in open plan office
    Close-up of a praying mantis and water droplets on a plant, Indonesia — Stock Photo
    Close-up of a praying mantis and water droplets on a plant, Indonesia
    Ivy stem climbing up tree trunk at autumn forest — Stock Photo
    Ivy stem climbing up tree trunk at autumn forest
    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
    Junior high students using computers in computer lab — Stock Photo
    Junior high students using computers in computer lab
    Head on view of little boy looking at bug under microscope — Stock Photo
    Head on view of little boy looking at bug under microscope
    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
    From above of small green echeveria plant placed on wooden table with roots and dirt in light place — Stock Photo
    From above of small green echeveria plant placed on wooden table with roots and dirt in light place
    Red stemmed baby chard — Stock Photo
    Red stemmed baby chard
    Festive stylish decorative Christmas bouquet with twigs of eucalyptus and bright red branches with berries placed on wooden table in room — Stock Photo
    Festive stylish decorative Christmas bouquet with twigs of eucalyptus and bright red branches with berries placed on wooden table in room
    Beautiful hortensia flowers — Stock Photo
    Beautiful hortensia flowers
    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
    Female standing in lush greenhouse and hiding face behind branch of tree with green foliage — Stock Photo
    Female standing in lush greenhouse and hiding face behind branch of tree with green foliage
    Palm leaves composition — Stock Photo
    Palm leaves composition
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Full frame shot of backlit green palm leaf — Stock Photo
    Full frame shot of backlit green palm leaf
    Junior high teacher helping students using computers in computer lab — Stock Photo
    Junior high teacher helping students using computers in computer lab
    Cerebellum and corpus callosum — Stock Photo
    Cerebellum and corpus callosum
    Tall coniferous trees with lichen on trunks growing in dense woodland on cold weather — Stock Photo
    Tall coniferous trees with lichen on trunks growing in dense woodland on cold weather
    Human embryonic stem cell on pin tip, conceptual digital artwork. — Stock Photo
    Human embryonic stem cell on pin tip, conceptual digital artwork.
    Branch of spruce with thin needles with melting snow in forest in winter day — Stock Photo
    Branch of spruce with thin needles with melting snow in forest in winter day
    Young charming brunette woman in cap looking at camera and holding fresh red flower in room — Stock Photo
    Young charming brunette woman in cap looking at camera and holding fresh red flower in room
    Woman standing in a garden holding a dahlia flower, Serbia — Stock Photo
    Woman standing in a garden holding a dahlia flower, Serbia
    Portrait smiling, confident girl student holding robot — Stock Photo
    Portrait smiling, confident girl student holding robot
    Sincere child in gardening apron with watering pot and blooming Helianthus looking at camera against Alocasia in countryside — Stock Photo
    Sincere child in gardening apron with watering pot and blooming Helianthus looking at camera against Alocasia in countryside
    Various pot plants on wooden table — Stock Photo
    Various pot plants on wooden table
    A girl photographs potted plants that she has grown in her home garden — Stock Photo
    A girl photographs potted plants that she has grown in her home garden
    Crop male hand holding bunch of garlic against table — Stock Photo
    Crop male hand holding bunch of garlic against table
    Lavandula, X-ray, radiology scan — Stock Photo
    Lavandula, X-ray, radiology scan
    Human brain anatomy, 3D illustration. — Stock Photo
    Human brain anatomy, 3D illustration.
    Top view full frame composition of bright multicolored dried autumn leaves on black background — Stock Photo
    Top view full frame composition of bright multicolored dried autumn leaves on black background
    Caterpillar cocoon attached to thin plant stem. — Stock Photo
    Caterpillar cocoon attached to thin plant stem.
    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)
    Top view of plants in glass flasks placed on yellow background with various leaves — Stock Photo
    Top view of plants in glass flasks placed on yellow background with various leaves