Apply the Concept of Natural Selection
to a Population of Birds
Flock X
Flock Y
Flock Z
The birds shown above have beaks with three
different shapes and sizes. These genetic
variations in the beak each appeared initially due
to mutations.
COMPLETE
Look at the three beaks. Which flock's birds have
beaks that seem most likely to be able to pierce a
piece of fruit? V Flock Xv
Suppose that a plant disease kills all the fruit. The
change could become a selective pressure
on the birds.
COMPLETE
Check all possible effects of this selective
pressure.
Flock X may try to eat other foods.
Flock X could migrate in search of fruit.
Flock X could slowly decrease in number.
Flocks Y and Z could benefit and increase.
Flock X could try to mutate.
CON