If there was an sudden change in exchange rates that resulted in fewer u. s. dollars being required to buy a euro, what could you expect?
a) europeans to buy more american products.
b) the dollar to depreciate quicker than the euro.
c) gold and silver would shift from europe to the u. s.
d) the dollar to appreciate when compared to the euro.

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

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.

Which of the following statements is true of cells