What is likely to happen if a new organism that feeds off mice is introduced? a. the mice population will increase in response to the arrival of the new organism. b. the mice population, grasshopper population, and plant population will all increase. c. the new organism will compete with the snake population for resources. d. the populations of the existing organisms will remain unaffected.

Waste water from industries and domestic sources can be treated by chlorination or ultraviolet radiation. there are pros and cons to using either chlorine or uv radiation to kill harmful microorganisms. what is one reason chlorination would be preferred over ultraviolet radiation? a) chlorine only eliminates visible impurities and is ineffective against microorganisms. b) chlorine not only kills bacteria but provides a residual effect on returning microorganisms. c) uv radiation can be used only to treat drinking water and is ineffective in treating waste water. d) ultraviolet radiation is more effective