Clostridium tetani is a bacterial species that causes disease by secreting proteins that disrupt normal neurological function. Without this ability, C. tetani would not be able to cause disease. Preformed antibodies can be used to treat the disease caused by this bacterium. What would you suspect the preformed antibodies are specific to?

Which of the following is not a defining characteristic of plants?

One of the purposes of transcription is to produce a sequence of bases that

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.