The Canby’s dropwort grows in wetlands in Georgia. It is an endangered plant because wetlands have been cleared for agriculture and construction. The larvae of the black swallowtail butterfly eat this plant.

What would MOST LIKELY happen to the black swallowtail butterfly if these plants continue to decrease?
A) The number of butterflies will drop.
B) The number of larvae will not change.
C) The larvae will find other plants to eat.
D) The butterflies will lay their eggs on other plants.

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