Bison have come close to extinction due to uncontrolled hunting, drought, and
disease. There is now very
little
genetic variation in bison
populations.
Which of the following is a result of the
limited genetic variation in the
current bison populations compared
to earlier bison populations with
more variation?
Select one:
O a. Bison in current populations are more resistant to new
diseases.
O b. The survival rate of young bison has increased in current
populations
O c. Bison in current populations are less able to interbreed with
other species
O d. The current bison populations are less likely to be able to
adapt to environmental changes.

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 is not a type of epithelial cell

Darwin’s hypothesis about how life changes over time is now called?