BecciSimm BecciSimm
  • 16-05-2016
  • Biology
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Explain what is a pathogen and why it can make someone sick?

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naticchioni naticchioni
  • 17-05-2016
a python is a forgein body that enters the human body. (for example it's like pollen for people thay have allergies) it makes people sick becaise the body identifies it as a threat and tries to expell it
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