Water conservation is not limited to conserving the amount of water available, but also considers the quality of the water available. the united states has come a long way in this area when compared to other countries. which of the statements below is a water quality conservation method used in the united states? a) sewage treatment plants b) allowing runoff of irrigation water c) throwing out old motor oil instead of recycling it d) painting boats in or over the water instead of in dry docks

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.