Why are hydrothermal vents capable of nurturing deep-sea life?
A.
They warm the water, creating a favorable temperature range for deep-sea life.
B.
They provide migratory routes for underground bacteria to emerge on the sea floor.
C.
They provide nutrients from Earth’s surface, which the deep-sea creatures can feed on.
D.
They provide the right conditions for the formation of chemicals, which bacteria can use as a source of energy.
E.
They provide migratory routes for vent creatures to emerge onto the sea floor, which deep-sea life can feed on.

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.