You get a ! the image below shows a certain type of global wind:

the earth is shown as a circle. equator is shown and labeled at 0 degrees. 30 degrees north and south latitudes are shown and labeled. 60 degrees north and south latitudes are shown and labeled. curved arrows are shown pointing from 30 degrees north and south latitudes towards the equator.

what best describes these winds?

polar easterlies caused by air above poles being relatively warmer
polar easterlies caused by air above poles being relatively cooler
trade winds caused by air above equator being relatively warmer
trade winds caused by air above equator being relatively cooler

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.