Natural selection

Which bugs were eaten more when there was a low level of pollution?

Which bugs were eaten more when there was a high level of pollution?

What factor determined the survival of the bug? Why?

If the pollution level is high for an extended period of time, does this affect the survival of the green bugs? Would they increase or Decrease?

If the pollution level is low for an extended period of time, does this affect the survival of the orange bugs? Would they increase or decrease?

Do you think this process occurs over a short period of time or a long period of time?