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    Female cell biologist examining flask containing stem cells cultivated in red growth medium. — Stock Photo
    Female cell biologist examining flask containing stem cells cultivated in red growth medium.
    Scientist holding multi-well plate with growth medium. — Stock Photo
    Scientist holding multi-well plate with growth medium.
    Biology laboratory scientist hands working with cell culture in flask. — Stock Photo
    Biology laboratory scientist hands working with cell culture in flask.
    Embryonic stem cells — Stock Photo
    Embryonic stem cells
    Teenage girls texting with cell phones in kitchen — Stock Photo
    Teenage girls texting with cell phones in kitchen
    Young women friends hanging out, using smart phones on apartment sofa — Stock Photo
    Young women friends hanging out, using smart phones on apartment sofa
    Teenage boy using smart phone on urban sidewalk — Stock Photo
    Teenage boy using smart phone on urban sidewalk
    Visual rendering of Animal cells — Stock Photo
    Visual rendering of Animal cells
    Woman using cell phone in car — Stock Photo
    Woman using cell phone in car
    Young man photographing woman on motorcycle at beach — Stock Photo
    Young man photographing woman on motorcycle at beach
    Young woman texting with smart phone — Stock Photo
    Young woman texting with smart phone
    Young friends using smart phones at cafe table — Stock Photo
    Young friends using smart phones at cafe table
    Close-up of female scientist using pipette in laboratory — Stock Photo
    Close-up of female scientist using pipette in laboratory
    Woman using cell phone on park bench — Stock Photo
    Woman using cell phone on park bench
    Businessman using cell phone at sidewalk cafe — Stock Photo
    Businessman using cell phone at sidewalk cafe
    Side view of woman using cell phone outside — Stock Photo
    Side view of woman using cell phone outside
    Inside the Mamertine Prison — Stock Photo
    Inside the Mamertine Prison
    Scanning electron micrograph of PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph of PC12 neurone in culture.
    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.
    Enthusiastic friends being photographed on double-decker bus — Stock Photo
    Enthusiastic friends being photographed on double-decker bus
    Smiling young woman texting with cell phone on bicycle on city street — Stock Photo
    Smiling young woman texting with cell phone on bicycle on city street
    Close up woman with manicure and rings covering smart phone screen — Stock Photo
    Close up woman with manicure and rings covering smart phone screen
    Digital illustration of cell in early stage of programmed cell death. — Stock Photo
    Digital illustration of cell in early stage of programmed cell death.
    Woman using smartphone in bed the morning after party — Stock Photo
    Woman using smartphone in bed the morning after party
    Smiling woman texting with cell phone in cafe — Stock Photo
    Smiling woman texting with cell phone in cafe
    Young women friends taking selfie with smart phone on urban street — Stock Photo
    Young women friends taking selfie with smart phone on urban street
    Casual businesswoman with headphones texting with cell phone in sunny office — Stock Photo
    Casual businesswoman with headphones texting with cell phone in sunny office
    Smiling young woman commuting on bicycle, talking on cell phone on sunny urban street — Stock Photo
    Smiling young woman commuting on bicycle, talking on cell phone on sunny urban street
    College students texting with cell phone — Stock Photo
    College students texting with cell phone
    Young woman with camera phone photographing friends sitting in apartment window — Stock Photo
    Young woman with camera phone photographing friends sitting in apartment window
    Couple taking self-portrait in park — Stock Photo
    Couple taking self-portrait in park
    Young man with camera phone photographing friends enjoying picnic on sunny summer beach — Stock Photo
    Young man with camera phone photographing friends enjoying picnic on sunny summer beach
    Boy in shirt and tie using cell phone — Stock Photo
    Boy in shirt and tie using cell phone
    Portrait teenage boy texting with smart phone — Stock Photo
    Portrait teenage boy texting with smart phone
    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.
    Tween girl using smart phone in back seat of car — Stock Photo
    Tween girl using smart phone in back seat of car
    Young adults using smart phones — Stock Photo
    Young adults using smart phones
    Lymphoma cancer cell — Stock Photo
    Lymphoma cancer cell
    Enthusiastic college students taking selfie in park — Stock Photo
    Enthusiastic college students taking selfie in park
    College students looking at cell phone — Stock Photo
    College students looking at cell phone
    High school students hanging out and using smart phones — Stock Photo
    High school students hanging out and using smart phones
    Carefree young women friends taking selfie with camera phone — Stock Photo
    Carefree young women friends taking selfie with camera phone
    Colored scanning electron micrograph of lymphoma cell showing early apoptotic change. — Stock Photo
    Colored scanning electron micrograph of lymphoma cell showing early apoptotic change.
    Couple using cell phone at sidewalk cafe, Paris, France — Stock Photo
    Couple using cell phone at sidewalk cafe, Paris, France
    Young friends taking selfie with camera phone at sunny summer riverside — Stock Photo
    Young friends taking selfie with camera phone at sunny summer riverside
    Teenage girls dancing in sunny kitchen — Stock Photo
    Teenage girls dancing in sunny kitchen
    Smiling fashion buyer texting with cell phone and drinking coffee — Stock Photo
    Smiling fashion buyer texting with cell phone and drinking coffee
    Human brain cells — Stock Photo
    Human brain cells
    Human sperm cells — Stock Photo
    Human sperm cells
    Smiling casual businesswoman texting on cell phone in office — Stock Photo
    Smiling casual businesswoman texting on cell phone in office
    Playful young couple taking selfie with camera phone — Stock Photo
    Playful young couple taking selfie with camera phone
    Teenage twin girls taking selfie with smart phone — Stock Photo
    Teenage twin girls taking selfie with smart phone
    Teenage twin sisters using smart phones — Stock Photo
    Teenage twin sisters using smart phones
    Portrait confident young male college student using smart phone in cafe — Stock Photo
    Portrait confident young male college student using smart phone in cafe
    Smiling young woman listening to music with headphones and texting with cell phone at laptop in cafe window — Stock Photo
    Smiling young woman listening to music with headphones and texting with cell phone at laptop in cafe window
    Young couple laughing, using cell phone at motor scooter on sunny urban street — Stock Photo
    Young couple laughing, using cell phone at motor scooter on sunny urban street
    Smiling teenage boy with headphones using mp3 player on urban sidewalk — Stock Photo
    Smiling teenage boy with headphones using mp3 player on urban sidewalk
    Tween girl texting with smart phone — Stock Photo
    Tween girl texting with smart phone
    Man photographing women in modern cafe — Stock Photo
    Man photographing women in modern cafe
    Visual rendering of Animal cells — Stock Photo
    Visual rendering of Animal cells