70 year old man has a 3-month history of progressive weakness and a weight loss of 13 kg along with intermittent fever , chills and chronic cough productive of yellow sputum occasionally streaked with blood. A sputum specimen is obtained and numerous acid-fast bacteria are seen on the smear . 1. Which organism wold mont likely to Cause this syndrome?
2. Which vaccine is given against disease?
3. How can you catch the discase?

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.