1. The Venturis rhamnius butterflies live in a forest that has two distinct habitats, one with thick
vegetation and another with more open space. The butterflies have a range of wing sizes, with
larger wings being advantageous in the thick vegetation and smaller wings being advantageous
in the open space. A severe drought causes a significant reduction in the Venturis rhamnius
population, leaving only a small number of individuals behind. Occasionally, strong winds bring
butterflies from other nearby forests into the Venturis rhamnius population. Furthermore, random
changes occur in the DNA of some Venturis rhamnius butterflies, resulting in some offspring with
larger or smaller wings.
What are the four evolutionary mechanisms at play in this scenario, and how do they work
together to affect the evolution of the Venturis rhamnius population?
Provide specific examples of each mechanism.
Explain how the 4 mechanisms can drive evolution of a species in combination with each other.