44,478 images for stem

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    Close up detail of broad bean leaf and water droplets

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    Gillyflowers in vase painted with chalk, close up

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    Elementary student dropping liquid in vial in laboratory

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    Teenage Girl Building a Telephone for Engineering School Project

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    Black student doing experiment in science lab

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    Elementary students examining liquid in vials in laboratory

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    Single Purple Calla Lily Flower isolated on White Background, Studio Shot

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    Close-up of Pink Tulip on White Background, Studio Shot

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    Chinese student examining molecular model

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    Elementary students with dropper and vial in laboratory

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    Elementary student studying in laboratory

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    Mother and daughter assembling electronics in science center workshop

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    Giant onion flowers against white background, close up

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    High school students and science teacher talking laptop

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    Young Sycamore leaves

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    Green leaf on a branch

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    High school students listening teacher science laboratory classroom

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    Science teacher helping high school student at laptop

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    Horned pansy (viola cornuta), white background, studio shot on white background.

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    Close-up of pink lotus flower, China

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  • 600-06773265

    Common Sunflower (Helianthus annuus) against Clear Blue Sky, Tuscany, Italy

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    Girl goggles assembling electronics circuit at science center

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  • 600-00608302

    Grapes

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    Spearmint

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    Low angle view of yellow Arctotis spp flowers pointing up towards the sun, common in open areas around Namaqualand, West Coast, South Africa

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  • 6117-07883395

    Teacher and elementary students in laboratory

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  • 600-06302191

    Three White Tulips

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    Elementary students and teacher using microscopes in classroom

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  • 679-03681369

    Grape stem. Light micrograph of a cross section through a grape vine (Vitis sp.) stem. At the centre of the stem is a large area of pith, consisting of parenchyma cells. Around this is a ring of vascular bundles that contain phloem (blue) and xylem (red) cells.

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  • 641-06839093

    Germany, Cultivation of cereal plant

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    Close up of tomatoes with water drops on white background

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    Withered sweet-brier

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  • 6106-06496200

    Cosmos flower in soft shades of pink.

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    High school students and teacher talking science laboratory

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    Group Of Fresh Grapes

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  • 649-07063104

    Studio shot of young broad bean plant and roots

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    High school students and teacher conducting scientific experiment

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    Portrait of teacher and elementary student in laboratory

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  • 600-07541352

    Close-up of Iceland Poppy (Papaver nudicaule) on White Background

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    White Amaryllis against white background, close up

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    High school students and teacher science laboratory classroom

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  • 641-06668166

    Cereal oats on white background, close up

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  • 600-06841711

    Red Poppy (Papaver rhoeas) in Barley Field, Hesse, Germany, Europe

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  • 641-07078595

    Watercress herbs on white background, close up

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    Buckwheat flowers and sky

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    Broccoli on green background

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    Bright Four Leaf Clover On White Background

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    Stylised iris bloom and leafs in bowl

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    Pinguicula agnata flower plant on white background, close up

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    A rose in mid-air against a pastel background

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    A shadowed Calla Lily, close-up

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    Close up of flower

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    Science teacher helping high school student at laptop

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    Flora Background

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  • 600-06773390

    Close-up of Pink Tulip on White Background, Studio Shot

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  • 600-06773264

    Common Sunflower (Helianthus annuus) against Clear Blue Sky, Tuscany, Italy

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  • 633-02417454

    Intertwined stems, close-up

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  • 682-03734939

    A field of daisies welcomes the spring, Kirstenbosch Botanical Gardens, Cape Town, Western Cape Province, South Africa

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  • 6106-06497403

    red poppy and flowers

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  • 618-06119155

    close-up

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  • 698-06615456

    Fresh cherries in bowl on tablecloth

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    Professor leading science class in laboratory

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    Sprouting Acorn

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  • 649-07063108

    Studio shot of young broad bean plant in pot

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  • 6106-06536028

    blue Anemone flower

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    Cosmos

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    Sliced beetroots with knife and chopping board on parchment paper

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    Close up of sunflower and blue sky

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    Vine tomato and basil, close up

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    Close-Up View Of Blue Flower

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    A close-up of a Calla Lily, stamen visible

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  • 6117-08087603

    Professor leading science class in laboratory

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  • 852-07610768

    Collage of student profiles and education subject choices

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  • 700-02371577

    Close-up of Pencil, Eraser, Ruler and Protractor

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  • 641-06551472

    Dried chillis on white background

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  • 679-04249805

    Purple Orchid

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  • 859-07356458

    Tulip flowers

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  • 679-03681338

    Cotton stem. Light micrograph of a cross-section through a cotton (Gossypium sp.) stem. There is a large area of central pith surrounded by secondary xylem (light green) and secondary phloem (dark green) tissue. Magnification: x10 when printed at 10 centimetres wide.

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  • 679-03680348

    Lime tree stem. Light micrograph of a section through the stem of a lime tree (Tilia sp.). At centre is the pith, surrounded by a layer of wood (xylem). A thin cambium separates this from the phloem. An outer layer of collenchyma is enclosed by the outer bark. Magnification: x30 when printed at 10 centimetres wide.

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  • 679-03298440

    Nasturtium stem. Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium (Tropaeolum sp.) stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (orange). Magnification: x100 when printed at 10 centimetres wide.

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  • 622-06191308

    Purple Flower On White Background

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  • 679-03680344

    Lily stem. Light micrograph of a section through a lily stem. A thin outer epidermis (dark blue) surrounds a layer of cortex. At the centre is the pith, which contains numerous vascular bundles. Magnification: x30 when printed at 10 centimetres wide.

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  • 679-03680346

    Lime tree stem. Light micrograph of a section through a lime tree (Tilia sp.) stem. Three growth rings are seen here, with an outer layer of cork (far right). Magnification: x80 when printed at 10 centimetres wide.

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  • 600-03466558

    Close-up of Stem of Plant

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  • 852-07610771

    Collage of teenage boy studying range of education subjects

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  • 641-07743059

    Daughter presenting her mother a white rose blossom

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  • 600-07288040

    Lady´s Slipper Orchid (Cypripedium calceolus), Bavaria, Germany

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  • 679-03298439

    Nasturtium stem. Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium (Tropaeolum sp.) stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow). Magnification: x100 when printed at 10 centimetres wide.

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  • 679-03680340

    Grape stem. Light micrograph of a section through a grape stem. At top right is the pith (blue), surround that is the xylem (purple) and then the phloem (red). Magnification: x80 when printed at 10 centimetres wide.

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  • 600-03171606

    Columbine Flower

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