Biology
The Role of Phenotypic Plasticity in Color Morph Expression in Peppered Moths
Quick fact
In peppered moths, caterpillars raised on diets with high levels of certain plant chemicals (tannins) tend to develop into darker adults, indicating that color morph expression is not solely genetic but also influenced by environmental factors.
Why this is interesting
You've probably heard that peppered moths turned dark during the Industrial Revolution. But did you know that the same caterpillar can become a light or dark moth depending on what it eats?