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Biology 9 Online
OpenStudy (anonymous):

What happens when the body cannot differentiate between pathogens and body cells? A. The organism will develop allergies. B. The excretory system will remove the pathogens. C. The immune system will target the body’s own cells. D. The digestive system will absorb the pathogens.

OpenStudy (shrutipande9):

can u make a guess or u r completely lost?

OpenStudy (anonymous):

I am completly lost and if i do not pass i will start my grade over

OpenStudy (shrutipande9):

is this a test? if it is then i am of no help..sorry

OpenStudy (anonymous):

no it is my review and so i am taking a quez

OpenStudy (anonymous):

to see how much i know

OpenStudy (anonymous):

please help

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