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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)
    Scientist holding multi-well plate with growth medium. — Stock Photo
    Scientist holding multi-well plate with growth medium.
    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
    Visual rendering of human brain — Stock Photo
    Visual rendering of human brain
    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).
    Monarch Butterfly Caterpillar (Danaus Plexippus) On Leaf, Shirley Richardson Butterfly Garden; Winnipeg, Manitoba, Canada — Stock Photo
    Monarch Butterfly Caterpillar (Danaus Plexippus) On Leaf, Shirley Richardson Butterfly Garden; Winnipeg, Manitoba, Canada
    Scientist viewing sample on glass slide under light microscope. — Stock Photo
    Scientist viewing sample on glass slide under light microscope.
    Smiling female science teacher leading lesson at projection screen in classroom — Stock Photo
    Smiling female science teacher leading lesson at projection screen in classroom
    Green seedling of houseplant placed in glass bottle with water on wooden shelf near white wall in kitchen — Stock Photo
    Green seedling of houseplant placed in glass bottle with water on wooden shelf near white wall in kitchen
    Land snail covered by white frost on dry stem. — Stock Photo
    Land snail covered by white frost on dry 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
    Junior high students and teachers using computers in computer lab — Stock Photo
    Junior high students and teachers using computers in computer lab
    Empty white frame hanging on bright dyed pink exotic plants in daylight — Stock Photo
    Empty white frame hanging on bright dyed pink exotic plants in daylight
    Male teacher and girl students conducting scientific experiment at microscope and laptop in laboratory classroom — Stock Photo
    Male teacher and girl students conducting scientific experiment at microscope and laptop in laboratory classroom
    Female designer working at laptop next to 3D printer in office — Stock Photo
    Female designer working at laptop next to 3D printer in office
    Female science teacher wearing lab coat, rubber glove and goggles, writing at whiteboard in classroom — Stock Photo
    Female science teacher wearing lab coat, rubber glove and goggles, writing at whiteboard in classroom
    Brainstem and cerebellum structures — Stock Photo
    Brainstem and cerebellum structures
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    Students programming and testing robotics in classroom — Stock Photo
    Students programming and testing robotics in classroom
    Female scientists working in laboratory — Stock Photo
    Female scientists working in laboratory
    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
    Nervous and circulatory systems — Stock Photo
    Nervous and circulatory systems
    Glasses filled with colorful liquids on concrete surface in bright sunlight — Stock Photo
    Glasses filled with colorful liquids on concrete surface in bright sunlight
    Businesswoman reviewing adhesive notes and flow chart, planning in office — Stock Photo
    Businesswoman reviewing adhesive notes and flow chart, planning in office
    Undifferentiated stem cells — Stock Photo
    Undifferentiated stem cells
    From above of creamy hummus with tiny octopus and calamari garnished with paprika and pine nuts with sesame seeds and green with oil — Stock Photo
    From above of creamy hummus with tiny octopus and calamari garnished with paprika and pine nuts with sesame seeds and green with oil
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Dead tree in Big Sur — Stock Photo
    Dead tree in Big Sur
    Digital illustration of human cells on blue background. — Stock Photo
    Digital illustration of human cells on blue background.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Low angle of young Asian woman dressed in burgundy turtleneck concentrated on cutting stem of pink rose with secateurs indoors — Stock Photo
    Low angle of young Asian woman dressed in burgundy turtleneck concentrated on cutting stem of pink rose with secateurs indoors
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    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
    Young green ears growing in garden plot — Stock Photo
    Young green ears growing in garden plot
    Colored scanning electron micrograph of human mesenchymal stem cell. — Stock Photo
    Colored scanning electron micrograph of human mesenchymal stem cell.
    Two robberflies mating, Indonesia — Stock Photo
    Two robberflies mating, Indonesia
    Computer programmers testing virtual reality simulator glasses at computer in office — Stock Photo
    Computer programmers testing virtual reality simulator glasses at computer in office
    Close-up of red skinned Gala apple on tree. — Stock Photo
    Close-up of red skinned Gala apple on tree.
    Composition made of old fashioned photo camera placed near dry autumn leaves and pomegranate — Stock Photo
    Composition made of old fashioned photo camera placed near dry autumn leaves and pomegranate
    Young pine tree stem — Stock Photo
    Young pine tree stem
    From above bright red appetizing cherries with stems on pink background — Stock Photo
    From above bright red appetizing cherries with stems on pink background
    A bunch of green chard on background. Vegan organic diet concept — Stock Photo
    A bunch of green chard on background. Vegan organic diet concept
    Portrait female scientist in clean suit studying coronavirus vaccine — Stock Photo
    Portrait female scientist in clean suit studying coronavirus vaccine
    Fresh organic purple cabbage on wood background. — Stock Photo
    Fresh organic purple cabbage on wood background.
    Close-up of ladybug larva in pupa stage on stem. — Stock Photo
    Close-up of ladybug larva in pupa stage on stem.
    Stem cell cultures on weighed in laboratory. — Stock Photo
    Stem cell cultures on weighed in laboratory.
    Top view of raw cut Boletus edulis mushrooms on wooden chopping board with garlic and parsley in light kitchen during cooking process — Stock Photo
    Top view of raw cut Boletus edulis mushrooms on wooden chopping board with garlic and parsley in light kitchen during cooking process
    Seedling Growing in a Greenhouse, Close-up view — Stock Photo
    Seedling Growing in a Greenhouse, Close-up view
    Girl student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student using microscope, conducting scientific experiment in laboratory classroom
    Girl holding a dandelion clock seedhead — Stock Photo
    Girl holding a dandelion clock seedhead
    Top view of fresh green salad with herbs and vegetables on wooden background, flat lay — Stock Photo
    Top view of fresh green salad with herbs and vegetables on wooden background, flat lay
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    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
    Young Asian woman cutting rose stem with secateurs — Stock Photo
    Young Asian woman cutting rose stem with secateurs
    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
    Close-up of bee fly hanging on wildflower stem. — Stock Photo
    Close-up of bee fly hanging on wildflower stem.
    Students programming at computer in classroom — Stock Photo
    Students programming at computer in classroom
    Students conducting scientific experiment in laboratory classroom — Stock Photo
    Students conducting scientific experiment in laboratory classroom
    Stem of green asparagus on fork — Stock Photo
    Stem of green asparagus on fork
    Dry trees with sticking roots in mountain valley in sunny day — Stock Photo
    Dry trees with sticking roots in mountain valley in sunny day