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    Scientist holding DNA autoradiogram in hand. — Stock Photo
    Scientist holding DNA autoradiogram in hand.
    Doctor looking at x-ray of knee. — Stock Photo
    Doctor looking at x-ray of knee.
    Sprouting beans in petri dishes on white background. — Stock Photo
    Sprouting beans in petri dishes on white background.
    Chemist hand picking samples stored in crimp neck vials in pharmaceutical laboratory. — Stock Photo
    Chemist hand picking samples stored in crimp neck vials in pharmaceutical laboratory.
    Close-up view of plants in test tubes. — Stock Photo
    Close-up view of plants in test tubes.
    Mature woman in MRI scanner. — Stock Photo
    Mature woman in MRI scanner.
    Chemist setting up vacuum pump in pharmaceutical laboratory. — Stock Photo
    Chemist setting up vacuum pump in pharmaceutical laboratory.
    Sprouting peas in test tubes on white background. — Stock Photo
    Sprouting peas in test tubes on white background.
    Blood samples in test tubes on white background. — Stock Photo
    Blood samples in test tubes on white background.
    Petri dishes on laboratory table, close-up. — Stock Photo
    Petri dishes on laboratory table, close-up.
    Petri dishes stacked on blue background. — Stock Photo
    Petri dishes stacked on blue background.
    MRI scans on hospital computer monitor. — Stock Photo
    MRI scans on hospital computer monitor.
    Laboratory sample tubes in rack. — Stock Photo
    Laboratory sample tubes in rack.
    Sprouting pea plants on white background. — Stock Photo
    Sprouting pea plants on white background.
    Beans and pulses in test tubes. — Stock Photo
    Beans and pulses in test tubes.
    Close-up view of plants in test tubes. — Stock Photo
    Close-up view of plants in test tubes.
    Doctor looking at MRI scan on monitor. — Stock Photo
    Doctor looking at MRI scan on monitor.
    Close-up view of eppendorf tubes. — Stock Photo
    Close-up view of eppendorf tubes.
    Mature woman in MRI scanner. — Stock Photo
    Mature woman in MRI scanner.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Close-up view of sprouting mung beans. — Stock Photo
    Close-up view of sprouting mung beans.
    Pipette dripping liquid into test tubes. — Stock Photo
    Pipette dripping liquid into test tubes.
    Fruits and vegetables in test tubes. — Stock Photo
    Fruits and vegetables in test tubes.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Male patient entering MRI scanner. — Stock Photo
    Male patient entering MRI scanner.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Pipette dropping liquid to vials. — Stock Photo
    Pipette dropping liquid to vials.
    Group of laboratory test tubes with colored liquids. — Stock Photo
    Group of laboratory test tubes with colored liquids.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Group of laboratory test tubes with colored liquids. — Stock Photo
    Group of laboratory test tubes with colored liquids.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Coloured magnetic resonance imaging (MRI) scan of an axial section through a healthy brain. — Stock Photo
    Coloured magnetic resonance imaging (MRI) scan of an axial section through a healthy brain.
    Beans and pulses in test tubes. — Stock Photo
    Beans and pulses in test tubes.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Human gallbladder anatomy, illustration. — Stock Photo
    Human gallbladder anatomy, illustration.
    Female patient lying in MRI scanner. — Stock Photo
    Female patient lying in MRI scanner.
    Human gallbladder, computer illustration. — Stock Photo
    Human gallbladder, computer illustration.
    Human clavicle bone, illustration. — Stock Photo
    Human clavicle bone, illustration.
    Close-up view of sprouting mung beans. — Stock Photo
    Close-up view of sprouting mung beans.
    Sprouting beans in petri dishes on white background. — Stock Photo
    Sprouting beans in petri dishes on white background.
    Light micrograph of a section through the surface of a tonsil showing the stratified squamous epithelium (pink) and underlying lymphoid tissue. — Stock Photo
    Light micrograph of a section through the surface of a tonsil showing the stratified squamous epithelium (pink) and underlying lymphoid tissue.
    Coloured X-ray of a 16 year old male with a fractured clavicle (collar bone). — Stock Photo
    Coloured X-ray of a 16 year old male with a fractured clavicle (collar bone).
    Coloured X-ray of the chest of a 52 year old female patient with metastatic (secondary) lung cancer (yellow). — Stock Photo
    Coloured X-ray of the chest of a 52 year old female patient with metastatic (secondary) lung cancer (yellow).
    Coloured angiogram (blood vessel X-ray) of the coronary arteries of a 52 year old patient. The artery at right has had a stent placed in it to treat a blockage. — Stock Photo
    Coloured angiogram (blood vessel X-ray) of the coronary arteries of a 52 year old patient. The artery at right has had a stent placed in it to treat a blockage.
    Coloured X-ray of the left breast (mammogram) of a 27 year old patient. — Stock Photo
    Coloured X-ray of the left breast (mammogram) of a 27 year old patient.
    Scanning electron micrograph (SEM) of a PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph (SEM) of a PC12 neurone in culture.
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp.
    Coloured X-ray of a 16 year old male with a fractured clavicle (collar bone). — Stock Photo
    Coloured X-ray of a 16 year old male with a fractured clavicle (collar bone).
    Light micrograph of a section through an aeciospore from a Puccinia sp. rust fungus. — Stock Photo
    Light micrograph of a section through an aeciospore from a Puccinia sp. rust fungus.
    Human breast bone, illustration. — Stock Photo
    Human breast bone, illustration.
    Human sciatic nerve, computer illustration. — Stock Photo
    Human sciatic nerve, computer illustration.
    Limescale, coloured scanning electron micrograph (SEM). — Stock Photo
    Limescale, coloured scanning electron micrograph (SEM).
    Limescale, coloured scanning electron micrograph (SEM). — Stock Photo
    Limescale, coloured scanning electron micrograph (SEM).
    Sprouting beans in petri dishes on white background. — Stock Photo
    Sprouting beans in petri dishes on white background.
    Coloured X-ray of a 16 year old male with a fractured clavicle (collar bone). — Stock Photo
    Coloured X-ray of a 16 year old male with a fractured clavicle (collar bone).
    Conceptual computer illustration of human brain structure shown in cross-section — Stock Photo
    Conceptual computer illustration of human brain structure shown in cross-section
    Stem cell research — Stock Photo
    Stem cell research
    Stem cell research — Stock Photo
    Stem cell research
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp.