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Biology 7 Online
OpenStudy (anonymous):

When a disease-causing agent enters an organism, the immune system alerts which specialized cells? red blood cells epithelial cells white blood cells somatic stem cells

OpenStudy (abhisar):

White blood cells or leukocytes

OpenStudy (anonymous):

thanks again @Abhisar im really bad in bio can u help me with some questions please

OpenStudy (abhisar):

Yep, go ahead

OpenStudy (shrutipande9):

try explaining ur answers..:)

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