What is a trench? Select all that apply. A very dark place
The deepest parts of the sea floor
An example of a mid ocean ridge
A pickle

Crossing over is a method of (blank)?

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.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?