Immigration into an existing ecosystem will cause a population to increase if the birth rate is greater than the death rate
the birth rate and death rate are balanced
the birth rate doubles and the death rate does not
the death rate is greater than the birth rate

How will you manage your time to accomplish the necessary tasks both on the job and at home?

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii

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.