Invasive species are organisms that have been introduced to new areas and have been able to spread and reproduce. what sorts of problems can they cause? a. they become native species. b. they compete with native species and disrupt the ecosystem. c. they generally reproduce more slowly than other species. d. they never spread beyond their original location, so they to fail to adapt.

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.