A particular region is experiencing a viral epidemic. Which of the following would increase the likelihood of the epidemic becoming a pandemic? A. A vaccine is developed that prevents individuals from being infected

B. Neighboring populations have little to no immunity to the disease.

C. The infection can be spread only by direct contact from one person to another

D. The region is remote and experiences little to no tourism.

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.