Answer:
<h3>The peppered moth was originally pale in color, but eventually evolved into a darker form when the air pollution of the Industrial Revolution caused tree bark to darken with soot and lichen was killed off. As lichen recovered and levels of soot in the atmosphere went down, the species turned pale again.</h3>
The correct answer that fits this description is: Toxin
This is considered false. Although the percentage of all air remains the exact same regardless of altitude, it all matters about the air pressure in the atmosphere. Even though the percentage would be the same, there would be fewer oxygen molecules at higher altitudes and lower pressure.
Answer:
Sorry, I dont remenber that process.
