What have a negative impact on an organism?
influenza smallpox cancer chickenpox viruses Pollution pathogens steroids
A B C D E F G H
Disease causing organisms are called pathogens .
Pathogens have a negative impact on an organism?
What have a negative impact on an organism? (A) influenza (B) smallpox (C) cancer (D) chickenpox (E) viruses (F) Pollution (G) pathogens (H) steroids