starlie352 starlie352
  • 04-05-2018
  • Biology
contestada

A/an is a protein or carbohydrate chain which serves as a marker and helps the immune system to identify cells as self or foreign

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shalbya51p87cgs
shalbya51p87cgs shalbya51p87cgs
  • 04-05-2018
i donot know but i think it is white blood cell
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