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    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).
    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
    Student in wheelchair examining fuel control valves on furnace in HVAC classroom — Stock Photo
    Student in wheelchair examining fuel control valves on furnace in HVAC classroom
    Researcher handling stem cell cultures in laboratory during research. — Stock Photo
    Researcher handling stem cell cultures in laboratory during research.
    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
    Colored scanning electron micrograph of human mesenchymal stem cell. — Stock Photo
    Colored scanning electron micrograph of human mesenchymal stem cell.
    Little child picking a long green bean in the garden — Stock Photo
    Little child picking a long green bean in the garden
    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
    Delicate white blossoming lisianthus flower on green stem for room decor at sunlight — Stock Photo
    Delicate white blossoming lisianthus flower on green stem for room decor at sunlight
    Female teacher and students watching scientific experiment chemical reaction in laboratory classroom — Stock Photo
    Female teacher and students watching scientific experiment chemical reaction in laboratory classroom
    Wooden chopping board surrounded by Fresh fruit and vegetables — Stock Photo
    Wooden chopping board surrounded by Fresh fruit and vegetables
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree. — Stock Photo
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree.
    Spring flowers still life on wooden — Stock Photo
    Spring flowers still life on wooden
    Rustic wooden box with glass vases and plants — Stock Photo
    Rustic wooden box with glass vases and plants
    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
    Portrait confident engineer with digital tablet operating robotic arm — Stock Photo
    Portrait confident engineer with digital tablet operating robotic arm
    Female surrounded by fresh flowers growing on tree branches in garden looking away — Stock Photo
    Female surrounded by fresh flowers growing on tree branches in garden looking away
    Back view anonymous shirtless male sitting in dark room near tender thin plant twig with withering leaves and looking out window — Stock Photo
    Back view anonymous shirtless male sitting in dark room near tender thin plant twig with withering leaves and looking out window
    Thistle bud weevil sitting on plant stem. — Stock Photo
    Thistle bud weevil sitting on plant stem.
    Illustration of pink stem cell on blue background. — Stock Photo
    Illustration of pink stem cell on blue background.
    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
    Student in wheelchair examining furnace fuel flow controls in HVAC classroom — Stock Photo
    Student in wheelchair examining furnace fuel flow controls in HVAC classroom
    Late snowfall on May's star hyacinths — Stock Photo
    Late snowfall on May's star hyacinths
    Female scientist holding multi-well plate with growth medium. — Stock Photo
    Female scientist holding multi-well plate with growth medium.
    Boy amidst plants — Stock Photo
    Boy amidst plants
    Tropical green nature on red background — Stock Photo
    Tropical green nature on red background
    Sunlit drop of water on stem — Stock Photo
    Sunlit drop of water on stem
    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
    Brown and white eggs in glass with stem — Stock Photo
    Brown and white eggs in glass with stem
    Cute boy and girl drawing at home — Stock Photo
    Cute boy and girl drawing at home
    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
    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
    Bright sunbeams shining through tree on field under clear blue sky — Stock Photo
    Bright sunbeams shining through tree on field under clear blue sky
    Allium flower, X-ray. — Stock Photo
    Allium flower, X-ray.
    Junior high students and teachers using computers in computer lab — Stock Photo
    Junior high students and teachers using computers in computer lab
    A girl takes pictures on a smartphone of plants, for her blog, which she has grown in her home garden — Stock Photo
    A girl takes pictures on a smartphone of plants, for her blog, which she has grown in her home garden
    Girl student programming and assembling robotics in classroom — Stock Photo
    Girl student programming and assembling robotics in classroom
    Designers working at desks in open plan office — Stock Photo
    Designers working at desks in open plan office
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Sincere child in gardening apron with watering pot and blooming Helianthus looking away against Alocasia in balcony — Stock Photo
    Sincere child in gardening apron with watering pot and blooming Helianthus looking away against Alocasia in balcony
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Student who had Spinal Meningitis setting up oscilloscope to use photo detector in laboratory — Stock Photo
    Student who had Spinal Meningitis setting up oscilloscope to use photo detector in laboratory
    Easter place setting with eucalyptus stems — Stock Photo
    Easter place setting with eucalyptus stems
    Red stemmed chard with roots — Stock Photo
    Red stemmed chard with roots
    Biotechnology or biotech, concept of creation, division and cellular development. High organic technology with productive purposes — Stock Photo
    Biotechnology or biotech, concept of creation, division and cellular development. High organic technology with productive purposes
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Young Asian woman cutting rose stem with secateurs — Stock Photo
    Young Asian woman cutting rose stem with secateurs
    Lynx spider sitting at edge of green leaf. — Stock Photo
    Lynx spider sitting at edge of green leaf.
    Students conducting scientific experiment in laboratory classroom — Stock Photo
    Students conducting scientific experiment in laboratory classroom
    Close-in View of Young Girl At Kitchen Table Doing School Work — Stock Photo
    Close-in View of Young Girl At Kitchen Table Doing School Work
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Plant growing on the trunk of an olive tree — Stock Photo
    Plant growing on the trunk of an olive tree
    Close-up of bee fly hanging on wildflower stem. — Stock Photo
    Close-up of bee fly hanging on wildflower stem.
    Closeup view of two empty Champagne glasses — Stock Photo
    Closeup view of two empty Champagne glasses
    Portrait female scientist in clean suit studying coronavirus vaccine — Stock Photo
    Portrait female scientist in clean suit studying coronavirus vaccine
    Lime tree stem — Stock Photo
    Lime tree stem
    High angle of crop unrecognizable female carrying wicker basket with edible mushrooms in woods — Stock Photo
    High angle of crop unrecognizable female carrying wicker basket with edible mushrooms in woods
    Students talking at table in library — Stock Photo
    Students talking at table in library
    Smiling male science teacher helping girl students conducting scientific experiment at microscope in laboratory — Stock Photo
    Smiling male science teacher helping girl students conducting scientific experiment at microscope in laboratory
    Portrait confident, serious male science teacher standing behind molecular structure in classroom — Stock Photo
    Portrait confident, serious male science teacher standing behind molecular structure in classroom