Now, say you tell a friend what happened with the smooth bricks. She says that because of the way the smooth bricks have interfered with your building process, she can determine what order the chain of bricks was supposed to be in, without even looking at them. However, she does ask you to label each of the smooth bricks with an LED light matching the color of the brick, so that the only bricks she can identify are the ends of each segment. These LED lights labeling the smooth bricks represent

select answer
pigment tracers
phosphate groups
nucleotides

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.