Vinyl chloride, chloromethane and the banned pesticide DDT are examples of chlorinated hydrocarbons. Chlorinated hydrocarbons are organic molecules wherein chlorine has been substituted for some of...
Resident flora of certain areas plays a definite role in maintaining health and. normal function. Members of the resident flora in the intestinal tract synthesize. vitamin K and aid in the absorption of nutrients. On mucous membranes and. skin, the resident flora may prevent colonization by pathogens and possible. disease through âbacterial interference.â The mechanism of bacterial interference. is not clear.
Normal Flora. The normal flora are bacteria which are found in or on our bodies on a semi-permanent basis without causing disease. There are more bacteria living in or on our bodies, than we have cells of our own. A human body contains around 10 13 cells. The human body is home to around 10 14 bacteria.