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    Laboratory worker pipetting liquid into microcentrifuge tube. — Stock Photo
    Laboratory worker pipetting liquid into microcentrifuge tube.
    Instructor demonstrating air conditioner control system on demo board to students in HVAC classroom one student in wheelchair — Stock Photo
    Instructor demonstrating air conditioner control system on demo board to students in HVAC classroom one student in wheelchair
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Female researcher using light microscope for examining stem cells in culture jar. — Stock Photo
    Female researcher using light microscope for examining stem cells in culture jar.
    Back view anonymous shirtless male sitting in dark room near tender thin plant twig with withering leaves — Stock Photo
    Back view anonymous shirtless male sitting in dark room near tender thin plant twig with withering leaves
    Back view anonymous shirtless male sitting in dark room near tender thin plant twig with withering leaves — Stock Photo
    Back view anonymous shirtless male sitting in dark room near tender thin plant twig with withering leaves
    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
    Section through a lily stem — Stock Photo
    Section through a lily stem
    Close-up of transparent glass vases with bunches of fresh flowers placed on table for event — Stock Photo
    Close-up of transparent glass vases with bunches of fresh flowers placed on table for event
    Closeup view of apple blossom bud on branch — Stock Photo
    Closeup view of apple blossom bud on branch
    Branches in a vase with a candle on a sideboard table — Stock Photo
    Branches in a vase with a candle on a sideboard table
    Robberfly with its grasshopper prey, Indonesia — Stock Photo
    Robberfly with its grasshopper prey, Indonesia
    Easter table setting with Easter eggs in a bird's nest and eucalyptus stems — Stock Photo
    Easter table setting with Easter eggs in a bird's nest and eucalyptus stems
    Side view of graceful European crested tit with spotted head sitting on plant stem in lush green meadow on sunny day — Stock Photo
    Side view of graceful European crested tit with spotted head sitting on plant stem in lush green meadow on sunny day
    Close-up view of Swiss Chard Leaf — Stock Photo
    Close-up view of Swiss Chard Leaf
    Junior high boy students using computers in computer lab — Stock Photo
    Junior high boy students using computers in computer lab
    Small spiky cactus sphere and stem growing in sandy ground — Stock Photo
    Small spiky cactus sphere and stem growing in sandy ground
    Computer programmers testing virtual reality simulator glasses in office — Stock Photo
    Computer programmers testing virtual reality simulator glasses in office
    Computer programmers and designers working in open plan office — Stock Photo
    Computer programmers and designers working in open plan office
    Top view of raw cut Boletus edulis mushrooms on rustic wooden chopping board during cooking process — Stock Photo
    Top view of raw cut Boletus edulis mushrooms on rustic wooden chopping board during cooking process
    Broccoli on wooden table — Stock Photo
    Broccoli on wooden table
    From above ripe green apple with foliage on plate on wooden table background — Stock Photo
    From above ripe green apple with foliage on plate on wooden table background
    Top view of fresh broccoli sprig representing concept of healthy vegetarian food on white geometric surface — Stock Photo
    Top view of fresh broccoli sprig representing concept of healthy vegetarian food on white geometric surface
    Central nervous system — Stock Photo
    Central nervous system
    Blonde Girl at Kitchen Table Does School Work on Tablet Computer — Stock Photo
    Blonde Girl at Kitchen Table Does School Work on Tablet Computer
    Students talking at table in library — Stock Photo
    Students talking at table in library
    Student who had Spinal Meningitis in a science lab on his smart phone — Stock Photo
    Student who had Spinal Meningitis in a science lab on his smart phone
    Various pot plants on wooden table — Stock Photo
    Various pot plants on wooden table
    Japanese honeysuckle stem — Stock Photo
    Japanese honeysuckle stem
    Branches and roses in a bowl on a metal stand — Stock Photo
    Branches and roses in a bowl on a metal stand
    Close-up of a spider eating a dragonfly, Indonesia — Stock Photo
    Close-up of a spider eating a dragonfly, Indonesia
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Basil inscription in soil with growing green seedlings in plastic containers on farmland in sunlight — Stock Photo
    Basil inscription in soil with growing green seedlings in plastic containers on farmland in sunlight
    Close-up view of Swiss Chard Leaf — Stock Photo
    Close-up view of Swiss Chard Leaf
    Green fern frond against empty road and gloomy woodland — Stock Photo
    Green fern frond against empty road and gloomy woodland
    Top view of stem with pink orchids on glass dish — Stock Photo
    Top view of stem with pink orchids on glass dish
    Cute boy with tablet at home — Stock Photo
    Cute boy with tablet at home
    Student setting up generator experiment with professor while student in wheelchair examines HVAC system — Stock Photo
    Student setting up generator experiment with professor while student in wheelchair examines HVAC system
    Shiny ripe red cherries on black background — Stock Photo
    Shiny ripe red cherries on black background
    Gnocchi with Broccoli, Broccoli Stem , Basil Pesto and Vegan sausages — Stock Photo
    Gnocchi with Broccoli, Broccoli Stem , Basil Pesto and Vegan sausages
    Overhead view of tasty ripe fig slices with aromatic thyme sprigs on baking paper — Stock Photo
    Overhead view of tasty ripe fig slices with aromatic thyme sprigs on baking paper
    Focused junior high boy student using computer in computer lab — Stock Photo
    Focused junior high boy student using computer in computer lab
    Red Wine Pouring into a Glass — Stock Photo
    Red Wine Pouring into a Glass
    Girl looking under microscope at worm. — Stock Photo
    Girl looking under microscope at worm.
    Bee fly hanging on plant stem. — Stock Photo
    Bee fly hanging on plant stem.
    Two Javan tree frogs on a plant, Indonesia — Stock Photo
    Two Javan tree frogs on a plant, Indonesia
    Bunch of fresh and green garlic on table — Stock Photo
    Bunch of fresh and green garlic on table
    Young pine tree stem — Stock Photo
    Young pine tree stem
    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
    Whole ripe green apple with foliage and pure small aqua drips on black background — Stock Photo
    Whole ripe green apple with foliage and pure small aqua drips on black background
    Boy student examining DNA model in laboratory classroom — Stock Photo
    Boy student examining DNA model in laboratory classroom
    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).
    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.
    Hand holding bright red leaf in autumn — Stock Photo
    Hand holding bright red leaf in autumn
    Scientist in rubber gloves filling pipette tray in laboratory — Stock Photo
    Scientist in rubber gloves filling pipette tray in laboratory
    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
    From above delicate green thin plant on body of crop unrecognizable person on sunny day — Stock Photo
    From above delicate green thin plant on body of crop unrecognizable person on sunny day
    Smiling male science teacher leading lesson at whiteboard in classroom — Stock Photo
    Smiling male science teacher leading lesson at whiteboard in classroom
    Focused junior high boy student using computer in computer lab — Stock Photo
    Focused junior high boy student using computer in computer lab
    Orange Cocktail in Stem Glass — Stock Photo
    Orange Cocktail in Stem Glass