Place the processes occurring in the digestive tract in the correct order. I Peristaltic waves of contraction propel the food along the esophagus.
II Gastric juices are secreted with the arrival of food into the duodenum.
III The acidic chyme is transferred through the pyloric sphincter.
IV HCl and pepsin begin digestion of proteins into shorter polypeptides.

A- I, II, and IV
B- IV, III, and II
C- I, II, and III
D- I, IV, and III
E- II, III, and IV

Antoine manages a number of apartment buildings that use natural gas for heating, cooking, and laundry. the scatter plot shows the correlation between the outside air temperature and antoine's natural gas bill. which type of correlation does the plot illustrate?

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.

Adistinctive characteristic of mammals that is not observed in other vertebrates is