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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)
    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.
    Scientist viewing sample on glass slide under light microscope. — Stock Photo
    Scientist viewing sample on glass slide under light microscope.
    Section through a peanut stem — Stock Photo
    Section through a peanut stem
    Young Asian woman cutting rose stem with secateurs — Stock Photo
    Young Asian woman cutting rose stem with secateurs
    Bleeding heart (Dicentra spectabilis), X-ray. — Stock Photo
    Bleeding heart (Dicentra spectabilis), X-ray.
    Cute boy with tablet at home — Stock Photo
    Cute boy with tablet at home
    Surprised students conducting exploding foam scientific experiment in classroom laboratory — Stock Photo
    Surprised students conducting exploding foam scientific experiment in classroom laboratory
    Close-up of ballet shoes and roses on stage — Stock Photo
    Close-up of ballet shoes and roses on stage
    Pink buds of flower — Stock Photo
    Pink buds of flower
    Light micrograph of shoot meristem. This is the tissue in most plants containing undifferentiated cells. Meristematic cells give rise to various organs of a plant and are responsible for growth. — Stock Photo
    Light micrograph of shoot meristem. This is the tissue in most plants containing undifferentiated cells. Meristematic cells give rise to various organs of a plant and are responsible for growth.
    Computer programmers testing virtual reality simulator glasses in open plan office — Stock Photo
    Computer programmers testing virtual reality simulator glasses in open plan office
    Plants with peppers and wavy foliage on thin stalks growing in row in greenhouse — Stock Photo
    Plants with peppers and wavy foliage on thin stalks growing in row in greenhouse
    Curious students watching chemical reaction, conducting scientific experiment in laboratory classroom — Stock Photo
    Curious students watching chemical reaction, conducting scientific experiment in laboratory classroom
    Student in wheelchair studying natural gas fuel line on furnace in HVAC classroom — Stock Photo
    Student in wheelchair studying natural gas fuel line on furnace in HVAC classroom
    Red chard and beetroot halves in front of a black background — Stock Photo
    Red chard and beetroot halves in front of a black background
    Artichoke flower head — Stock Photo
    Artichoke flower head
    Branch of spruce with thin needles with melting snow in forest in winter day — Stock Photo
    Branch of spruce with thin needles with melting snow in forest in winter day
    Computer programmers testing virtual reality simulator glasses in office — Stock Photo
    Computer programmers testing virtual reality simulator glasses in office
    Field harvesting on the fields — Stock Photo
    Field harvesting on the fields
    Lime tree stem — Stock Photo
    Lime tree stem
    Close-up of hand of cell biologist holding flask of stem cells cultivated in red growth medium. — Stock Photo
    Close-up of hand of cell biologist holding flask of stem cells cultivated in red growth medium.
    Close-up of technician storing stem cell samples in cryostorage. — Stock Photo
    Close-up of technician storing stem cell samples in cryostorage.
    Close-up of flesh fly covered by dew drops at top of wild plant stem. — Stock Photo
    Close-up of flesh fly covered by dew drops at top of wild plant stem.
    Instructor training students about air conditioning units in HVAC classroom — Stock Photo
    Instructor training students about air conditioning units in HVAC classroom
    Various pot plants on wooden table — Stock Photo
    Various pot plants on wooden table
    Leaves branching off a stem — Stock Photo
    Leaves branching off a stem
    Close-up of noctuid moth on wild plant stem. — Stock Photo
    Close-up of noctuid moth on wild plant stem.
    Computer programmers testing virtual reality simulator glasses at computer in office — Stock Photo
    Computer programmers testing virtual reality simulator glasses at computer in office
    Lily flower anther — Stock Photo
    Lily flower anther
    Pensive girl student conducting science experiment in classroom laboratory — Stock Photo
    Pensive girl student conducting science experiment in classroom laboratory
    From above of fresh ripe purple onions with green stems placed on black table — Stock Photo
    From above of fresh ripe purple onions with green stems placed on black table
    Meadow with dry plants — Stock Photo
    Meadow with dry plants
    Portrait confident engineers with digital tablet programming robotic arm in office — Stock Photo
    Portrait confident engineers with digital tablet programming robotic arm in office
    Branches in a vase with a candle on a sideboard table — Stock Photo
    Branches in a vase with a candle on a sideboard table
    Plant growing on the trunk of an olive tree — Stock Photo
    Plant growing on the trunk of an olive tree
    Smiling male teacher and students programming robotics at laptop in classroom — Stock Photo
    Smiling male teacher and students programming robotics at laptop in classroom
    Male teacher and smiling girl student conducting scientific experiment at microscope in laboratory classroom — Stock Photo
    Male teacher and smiling girl student conducting scientific experiment at microscope in laboratory classroom
    Student examining electrical control system on furnace with professor in HVAC classroom one student in wheelchair — Stock Photo
    Student examining electrical control system on furnace with professor in HVAC classroom one student in wheelchair
    Fresh carrots on a wooden chopping board — Stock Photo
    Fresh carrots on a wooden chopping board
    Junior high students and teachers using computers in computer lab — Stock Photo
    Junior high students and teachers using computers in computer lab
    Close up of a tree in front of a house. — Stock Photo
    Close up of a tree in front of a house.
    From above of fresh raw leeks with green stems placed on black surface — Stock Photo
    From above of fresh raw leeks with green stems placed on black surface
    Male teacher leading physics lesson at whiteboard in classroom — Stock Photo
    Male teacher leading physics lesson at whiteboard in classroom
    Side view of female with closed eyes enjoying sunny day on grassy meadow in countryside — Stock Photo
    Side view of female with closed eyes enjoying sunny day on grassy meadow in countryside
    Dandelion seeds blowing in wind at summer day — Stock Photo
    Dandelion seeds blowing in wind at summer day
    Male designer at whiteboard leading conference room meeting — Stock Photo
    Male designer at whiteboard leading conference room meeting
    Meadow with dry plants — Stock Photo
    Meadow with dry plants
    Wheatgrass plants with dense network of roots — Stock Photo
    Wheatgrass plants with dense network of roots
    Close-up of ballet shoes and roses on stage — Stock Photo
    Close-up of ballet shoes and roses on stage
    Silhouette of wheat stalk against sunset — Stock Photo
    Silhouette of wheat stalk against sunset
    Light micrograph of a cross sections of monocot stem. — Stock Photo
    Light micrograph of a cross sections of monocot stem.
    Red vegetables on a wooden table in front of a window — Stock Photo
    Red vegetables on a wooden table in front of a window
    Female researcher using micropipette and tubes in laboratory, close-up. — Stock Photo
    Female researcher using micropipette and tubes in laboratory, close-up.
    Two Javan tree frogs on a plant, Indonesia — Stock Photo
    Two Javan tree frogs on a plant, Indonesia
    Bowl of freshly peas. — Stock Photo
    Bowl of freshly peas.
    Top view of tasty fresh fig pieces with juicy pulp near aromatic thyme sprigs on crumpled surface — Stock Photo
    Top view of tasty fresh fig pieces with juicy pulp near aromatic thyme sprigs on crumpled surface
    Wooden chopping board surrounded by Fresh fruit and vegetables — Stock Photo
    Wooden chopping board surrounded by Fresh fruit and vegetables
    Students examining liquid in test tube, conducting scientific experiment in laboratory classroom — Stock Photo
    Students examining liquid in test tube, conducting scientific experiment in laboratory classroom
    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