Question

10. True/false questions. Put a “true” or “false” next to the statement. If true, explain

why. If the statement is false, explain why it is false.

(a) “Because of the recent development of universal growth conditions, the majority of microorganisms are culturable.”

(b) “The addition of high concentrations of charged chemicals (positive or negative) can decrease aggregate formation in soil.”

(c) “In the addition of a genetically-engineered bacterium to a lake, the bacterium would represent an autochthonous population.”

(d) “The behavior of microorganisms is difficult to predict because the environment acts as a closed system.”

(e) “Metal bioavailability is often increased during the secondary treatment in wastewater treatment.”

(f) “The three phases in soil are sand, silt and clay.”

(g) “Only aerobic metabolisms will exist in an aerobic environmental system.”