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    Illustration of pink stem cell on black background. — Stock Photo
    Illustration of pink stem cell on black background.
    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 cells, digital illustration. — Stock Photo
    Human embryonic stem cells, digital illustration.
    Young female scientist viewing microscope during research. — Stock Photo
    Young female scientist viewing microscope during research.
    Junior high students using computers, listening to teacher in classroom — Stock Photo
    Junior high students using computers, listening to teacher in classroom
    Female teacher and girl student programming robotics at laptop in classroom — Stock Photo
    Female teacher and girl student programming robotics at laptop in classroom
    Unrecognizable female with manicure wearing dress demonstrating red laceleaf with pestle and green stem while standing in room on blurred background — Stock Photo
    Unrecognizable female with manicure wearing dress demonstrating red laceleaf with pestle and green stem while standing in room on blurred background
    Peony flower (Paeonia officinalis), X-ray. — Stock Photo
    Peony flower (Paeonia officinalis), X-ray.
    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
    From above bright red appetizing cherries with stems on pink background — Stock Photo
    From above bright red appetizing cherries with stems on pink background
    Girl students using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl students using microscope, conducting scientific experiment in laboratory classroom
    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
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    Close up of Western sword ferns (Polystichum munitum) in lush, temperate rainforest, along the North Fork Snoqualmie River, near North Bend, Washington — Stock Photo
    Close up of Western sword ferns (Polystichum munitum) in lush, temperate rainforest, along the North Fork Snoqualmie River, near North Bend, Washington
    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
    Plant growing on the trunk of an olive tree — Stock Photo
    Plant growing on the trunk of an olive tree
    Closeup of delicate soft white stamen — Stock Photo
    Closeup of delicate soft white stamen
    Male teacher and students researching at laptop in library — Stock Photo
    Male teacher and students researching at laptop in library
    Human skeleton with skull and ribbed bones near growing plant and white wall in room — Stock Photo
    Human skeleton with skull and ribbed bones near growing plant and white wall in room
    Girl at rapeseed field — Stock Photo
    Girl at rapeseed field
    High angle of acoustic guitar and ukulele placed on green grass growing in nature in summer time in daylight — Stock Photo
    High angle of acoustic guitar and ukulele placed on green grass growing in nature in summer time in daylight
    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
    Meadow with dry plants — Stock Photo
    Meadow with dry plants
    Young Asian woman cutting rose stem with secateurs — Stock Photo
    Young Asian woman cutting rose stem with secateurs
    Green plant on a corner of a table — Stock Photo
    Green plant on a corner of a table
    Young pine tree stem — Stock Photo
    Young pine tree stem
    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
    Texture of dry fallen yellow autumn leaf with thin veins and stem against blurred gray background — Stock Photo
    Texture of dry fallen yellow autumn leaf with thin veins and stem against blurred gray background
    Miniature snail on a plant, Indonesia — Stock Photo
    Miniature snail on a plant, Indonesia
    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
    Charming female with long wavy hair hiding face behind blooming flowers while standing in countryside in sunny day — Stock Photo
    Charming female with long wavy hair hiding face behind blooming flowers while standing in countryside in sunny day
    Teen girl holding dandelion seed head on long stem. — Stock Photo
    Teen girl holding dandelion seed head on long stem.
    Instructor training students about air conditioning units in HVAC classroom — Stock Photo
    Instructor training students about air conditioning units in HVAC classroom
    Thistle bud weevil sitting on common thistle stem. — Stock Photo
    Thistle bud weevil sitting on common thistle stem.
    Glasses filled with colorful liquids on concrete surface in bright sunlight — Stock Photo
    Glasses filled with colorful liquids on concrete surface in bright sunlight
    Western sword fern — Stock Photo
    Western sword fern
    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
    Savoury snacks with mug of tea and stem of flowers on black wooden board against dark background — Stock Photo
    Savoury snacks with mug of tea and stem of flowers on black wooden board against dark background
    Dense evergreen forest with covered by moss tall redwoods in Big Basin Redwoods State Park in USA — Stock Photo
    Dense evergreen forest with covered by moss tall redwoods in Big Basin Redwoods State Park in USA
    Close up of aloe stalks on white background — Stock Photo
    Close up of aloe stalks on white background
    Fresh fruit and vegetables on a wooden table — Stock Photo
    Fresh fruit and vegetables on a wooden table
    Human embryonic stem cell, digital illustration. — Stock Photo
    Human embryonic stem cell, digital illustration.
    Beautiful freshly cut long twigs with green leaves and purple flowers standing in glass jar with water on round wooden table in old shabby room with mirrors — Stock Photo
    Beautiful freshly cut long twigs with green leaves and purple flowers standing in glass jar with water on round wooden table in old shabby room with mirrors
    Scientist using pipette tray at fume hood in laboratory — Stock Photo
    Scientist using pipette tray at fume hood in laboratory
    Eyewear on open textbook against ceramic saucer with cup and dried plant on table in house — Stock Photo
    Eyewear on open textbook against ceramic saucer with cup and dried plant on table in house
    Milk cap mushroom growing in woods covered with fallen dry foliage in autumn day — Stock Photo
    Milk cap mushroom growing in woods covered with fallen dry foliage in autumn day
    Single cherry tomato close-up view — Stock Photo
    Single cherry tomato close-up view
    Scenery of hill covered with snow and bare shrubs growing in winter nature under cloudy sky — Stock Photo
    Scenery of hill covered with snow and bare shrubs growing in winter nature under cloudy sky
    Closeup view of Champagne and wine glasses hanging upside down in a restaurant shelf — Stock Photo
    Closeup view of Champagne and wine glasses hanging upside down in a restaurant shelf
    Close-up of dried lotus flower, dark background — Stock Photo
    Close-up of dried lotus flower, dark background
    Close up scientist in rubber gloves placing specimen in centrifuge — Stock Photo
    Close up scientist in rubber gloves placing specimen in centrifuge
    Closeup green tomato ripening with raindrops on branches of plant growing in agricultural field in countryside — Stock Photo
    Closeup green tomato ripening with raindrops on branches of plant growing in agricultural field in countryside
    Swiss chard with bacon and tomato — Stock Photo
    Swiss chard with bacon and tomato
    Junior high boy students using computers in computer lab — Stock Photo
    Junior high boy students using computers in computer lab
    Close-up of Idas blue butterfly on arc shaped stem. — Stock Photo
    Close-up of Idas blue butterfly on arc shaped stem.
    Closeup green tomatoes ripening with raindrops on branches of plant growing in agricultural field in countryside — Stock Photo
    Closeup green tomatoes ripening with raindrops on branches of plant growing in agricultural field in countryside
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Close up scientist using pipette under fume hood in laboratory — Stock Photo
    Close up scientist using pipette under fume hood in laboratory
    Forkful of Tagliatelle with stem broccoli on rustic surface — Stock Photo
    Forkful of Tagliatelle with stem broccoli on rustic surface