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    Preschooler boy undergoing logic test with numbers for developmental psychology test in female psychologist office. — Stock Photo
    Preschooler boy undergoing logic test with numbers for developmental psychology test in female psychologist office.
    Lab technician using flame test probe to gather sample from vile — Stock Photo
    Lab technician using flame test probe to gather sample from vile
    Blood samples in microcentrifuge tube strip for genetic analysis. — Stock Photo
    Blood samples in microcentrifuge tube strip for genetic analysis.
    Tubes for biological test in rack on blue background. — Stock Photo
    Tubes for biological test in rack on blue background.
    Scientist holding DNA sample in tube with autoradiograph on DNA gel. — Stock Photo
    Scientist holding DNA sample in tube with autoradiograph on DNA gel.
    Close-up of female hand using pen-like lancing device for prick test. — Stock Photo
    Close-up of female hand using pen-like lancing device for prick test.
    Scientist taking test tube from freezer in laboratory — Stock Photo
    Scientist taking test tube from freezer in laboratory
    Medical stethoscope near tonometer, scissors, tweezers and pen on wooden table — Stock Photo
    Medical stethoscope near tonometer, scissors, tweezers and pen on wooden table
    Schoolboy doing chemistry experiment in school laboratory. — Stock Photo
    Schoolboy doing chemistry experiment in school laboratory.
    Female researcher studying DNA autoradiogram. — Stock Photo
    Female researcher studying DNA autoradiogram.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Boy wearing headphones as having hearing test, female doctor putting hand on kid shoulder. — Stock Photo
    Boy wearing headphones as having hearing test, female doctor putting hand on kid shoulder.
    Biologist hand with protective glove holding trowel with soil above samples separated in containers. — Stock Photo
    Biologist hand with protective glove holding trowel with soil above samples separated in containers.
    College students taking test at desks in classroom — Stock Photo
    College students taking test at desks in classroom
    Scientist checking a solution in test tube in lab — Stock Photo
    Scientist checking a solution in test tube in lab
    Doctors talking to patient before mri scanning test at hospital — Stock Photo
    Doctors talking to patient before mri scanning test at hospital
    Hospital radiologist sitting at desk in front of CT scans. — Stock Photo
    Hospital radiologist sitting at desk in front of CT scans.
    Laboratory assistant holding medical samples in rack, mid section. — Stock Photo
    Laboratory assistant holding medical samples in rack, mid section.
    Person hand filling test tube with tap water. — Stock Photo
    Person hand filling test tube with tap water.
    Female agronomist taking sample with soil probe sampler. — Stock Photo
    Female agronomist taking sample with soil probe sampler.
    Radiologist recording results of CT scanning. — Stock Photo
    Radiologist recording results of CT scanning.
    Green plants in test tubes, botanical research concept. — Stock Photo
    Green plants in test tubes, botanical research concept.
    Close-up of drop of red liquid pipetted into multi-well sample tray. — Stock Photo
    Close-up of drop of red liquid pipetted into multi-well sample tray.
    Scientist putting on protective mask in laboratory. — Stock Photo
    Scientist putting on protective mask in laboratory.
    Hand of researcher holding vacutainer tube above pool of blood and syringe. — Stock Photo
    Hand of researcher holding vacutainer tube above pool of blood and syringe.
    Female scientist in clean suit with test tubes studying coronavirus — Stock Photo
    Female scientist in clean suit with test tubes studying coronavirus
    Optician testing a boy's eyes with optometry devices — Stock Photo
    Optician testing a boy's eyes with optometry devices
    Female doctor preparing to do a pcr test — Stock Photo
    Female doctor preparing to do a pcr test
    Senior woman using spirometer, measuring lung capacity and peak expiratory force. — Stock Photo
    Senior woman using spirometer, measuring lung capacity and peak expiratory force.
    Optometrist adjusting the optometry equipment during study of the eyesight of a black woman — Stock Photo
    Optometrist adjusting the optometry equipment during study of the eyesight of a black woman
    Lab technician igniting Bunsen burner — Stock Photo
    Lab technician igniting Bunsen burner
    Optometrist adjusting the retinograph during study of the eyesight of a black woman — Stock Photo
    Optometrist adjusting the retinograph during study of the eyesight of a black woman
    College students taking test at desk in classroom — Stock Photo
    College students taking test at desk in classroom
    Plant seedling in soil in Petri dish and tweezers in laboratory. — Stock Photo
    Plant seedling in soil in Petri dish and tweezers in laboratory.
    Physician measuring thigh circumference with tape measure on male athlete. — Stock Photo
    Physician measuring thigh circumference with tape measure on male athlete.
    Cropped image of Water department technician shutting fire hydrant to flush water pipes — Stock Photo
    Cropped image of Water department technician shutting fire hydrant to flush water pipes
    View of ultrasound scanner with pregnant woman begin exterminate in modern hospital — Stock Photo
    View of ultrasound scanner with pregnant woman begin exterminate in modern hospital
    Close-up of equipment holder in a laboratory — Stock Photo
    Close-up of equipment holder in a laboratory
    Lab assistant using multi pipette and multiwell. — Stock Photo
    Lab assistant using multi pipette and multiwell.
    Close-up of petri dish and dropping pipette for genetic research. — Stock Photo
    Close-up of petri dish and dropping pipette for genetic research.
    Unrecognizable female medic in mask and gloves holding tube with blood sample in modern lab in clinic — Stock Photo
    Unrecognizable female medic in mask and gloves holding tube with blood sample in modern lab in clinic
    Female agronomist taking sample with soil probe sampler. — Stock Photo
    Female agronomist taking sample with soil probe sampler.
    Asian female doctor wearing face mask and taking swab test from female patient at home. healthcare and medical physiotherapy treatment. — Stock Photo
    Asian female doctor wearing face mask and taking swab test from female patient at home. healthcare and medical physiotherapy treatment.
    Stacked agar plates with microbiological cultures on plain background. — Stock Photo
    Stacked agar plates with microbiological cultures on plain background.
    Scientists preparing multiwell plate with blood samples for testing and analysis. — Stock Photo
    Scientists preparing multiwell plate with blood samples for testing and analysis.
    Female patient undergoing patch test in allergy clinic. — Stock Photo
    Female patient undergoing patch test in allergy clinic.
    Plastic sample containers in laboratory, close-up — Stock Photo
    Plastic sample containers in laboratory, close-up
    Closeup view of empty laboratory beakers in drawer — Stock Photo
    Closeup view of empty laboratory beakers in drawer
    Eye test equipment in a laboratory — Stock Photo
    Eye test equipment in a laboratory
    Doctor checking grip strength for patient — Stock Photo
    Doctor checking grip strength for patient
    Crop scientist taking off work gloves — Stock Photo
    Crop scientist taking off work gloves
    Doctors practicing tracheal intubation on infant training dummies. — Stock Photo
    Doctors practicing tracheal intubation on infant training dummies.
    Scientist in protective wear pouring liquid in steaming flask — Stock Photo
    Scientist in protective wear pouring liquid in steaming flask
    Tools for gathering evidence at scene of crime. — Stock Photo
    Tools for gathering evidence at scene of crime.
    Green coffee beans in test tube on white background, studio shot. — Stock Photo
    Green coffee beans in test tube on white background, studio shot.
    Ophthalmologist examining a woman's eyes with a slit lamp — Stock Photo
    Ophthalmologist examining a woman's eyes with a slit lamp
    Optometrist adjusting the retinograph during study of the eyesight of a black woman — Stock Photo
    Optometrist adjusting the retinograph during study of the eyesight of a black woman
    Side view of scientist providing research and operating with tablet on wall of laboratory. — Stock Photo
    Side view of scientist providing research and operating with tablet on wall of laboratory.
    Computer programmers testing virtual reality simulator glasses in office — Stock Photo
    Computer programmers testing virtual reality simulator glasses in office
    School in Grashoek village — Stock Photo
    School in Grashoek village