2. After watching this clip, students
can work in groups and research other ways that species, such as plants
with pollination, make sure that genes are spread across populations.
The groups can present their findings to the rest of the class.
3. Students can take a more in-depth look
at species that have limited genetic diversity such as cheetahs and
dandelions to see what effect that has on the overall health of the
4. As an evaluation to a unit on genetic
variation you can show this clip and have students describe what is
happening and why it is important for the ballooning to occur in terms
of the genetic health of the spider population.