Brianna has a sweet tooth. she cannot resist the urge to eat fudge brownies and chocolate tarts. she relishes feasting on sugary food items. however, being of a slim build, she wants to maintain her weight. she often gets depressed about her uncontrollable eating urges and consumes emetic, a drug to induce barfing. brianna is most likely suffering
a) bulimia nervosa
b) bipolar disorder
c) anorexia nervosa
d) obesity

The asian shore crab (hemigrapsus sanguineus) is an invasive species that has impacted the atlantic coast. predict what characteristic of this invader would most likely disrupt the biodiversity of this area.

When analyzing tree rings, what do scientists assume a thin ring indicates?

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.