Which of the following occurs when a cell repairs a double-strand DNA break by the process of nonhomologous end joining? Choose one:

The DNA sequence at the site of repair is altered by a short deletion.
The DNA sequence at the site of repair matches that of a homologous chromosome.
The DNA sequence at the site of repair is altered by a short addition.
The original DNA sequence at the site of repair is reconstituted with 100% accuracy.
The DNA sequence at the site of repair contains a short segment of telomere DNA.

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.