Bottleneck effect occurs when a population suddenly gets much smaller.
Effects of bottlenecks are unpredictable .
When a population suddenly gets much smaller the effects are unpredictable.
What is the effect of a population suddenly getting much smaller?
Options:
  * major threat to health
  * Decreased precipitation
  * a lot of human deaths
  * movement of tectonic plates
  * it is unpredicatbale
  * If they can no longer get food
  * Plant growth is reduced
  * enormous damage to homes