Natural Selection Story
Storyboard-Text
- Not Immune
- Immune
- Not Immune
- At this farm, most of the beetles in this population are not immune to pesticides, while a few are immune because of a mutation.
- Differential Survival and Reproduction
- Variation
- Immune
- Not Immune
- Not Immune
- Not Immune
- Not Immune
- Not Immune
- Not Immune
- AND
- Parents that are not immune produce non-immune babies while parents that are immune produce immune babies.
- Not Immune
- Selective Pressure
- Inheritance
- Immune
- Immune
- i
- Immune
- It didn't really matter which beetles were immune or not until one day a farmer sprayed pesticides all over the crops where the beetles lived.
- Environment
- Adaptation
- x
- i
- x
- Not Immune
- The beetles that are not immune cannot fight the pesticides and they die, while the beetles that are immune can fight the pesticides and survive and reproduce.
- i
- Immune
- x
- x
- Not Immune
- Immune
- All of the beetles that were not immune died from the pesticides. The beetles that are immune are not affected and they survive. The pesticides are putting selective pressure on the beetles.
- x
- x
- Not Immune
- Not Immune
- Immune
- x
- Not Immune
- Immune
- Not Immune
- Over time, the frequency of immune beetles increased because they survived the pesticides and reproduced while the frequency of non-immune beetles decreased because they died.
- Immune
- Immune
- Immune
- Immune
- Not Immune
- Immune
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