This is the condition where an organism's numbers exceed the carrying capacity of its habitat.

Classify the structures as homologous or analogous, depending on their structure and function.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

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.