14)
Stabilizing selection is the most common form of natural selection. It eliminates any extreme expression of a trait in a population
of organisms when the average expression leads to a higher rate of survival. Stabilizing selection tends to

An easy way to calculate the amount of energy available at each level is to what?

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?

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.