Groundwater can be contaminated by bacteria and other pathogens that seep from septic tanks, broken sewer lines, and barnyard wastes. In many instances, however, this is not a serious health problem even in the presence of a large population. Why?
A) Without sunlight, the pathogens generally die out.
B) Most municipalities have alert systems to warn people of an outbreak.
C) The soil itself may serve to filter out the pathogens.
D) The diseases spread by these pathogens are not typically contagious.
Question 2
Krypton is a noble gas.
Indicate whether the statement is true or false
Three Mechanisms of Gene Transfer Found in Bacteria
Attack systems of pathogenic bacteria.
Bacteria
Bacteria Diagram
Pathogens