Evolution In Action

Biologist Larry Gilbert studies Heliconius butterflies at the University of Texas, focusing on their diverse color patterns and potential role in speciation. Supported by the National Science Foundation, Gilbert's team observes a possible evolutionary split in Ecuador, where color preference may lead to new species. They compare these findings with Costa Rican butterflies, where color differences already define separate species. The research aims to identify genes responsible for these traits, offering insights into evolution.

What is the primary function of the color patterns in Heliconius butterflies?

• To blend into the environment

• To signal toxicity to predators

• To attract mates

• To regulate body temperature

What is speciation?

• The migration of a species to a new habitat

• The extinction of a species

• The adaptation of a species to a new environment

• The process of one species splitting into two that no longer interbreed

In the study of Heliconius butterflies in Ecuador, what initial behavior was observed?

• Yellows and whites preferred different habitats

• Whites preferred whites, while yellows showed no color preference

• Yellows preferred yellows, while whites showed no color preference

• Both yellows and whites preferred different species

What is a key factor that can lead to speciation according to the research?

• Color preference in mate selection

• Geographical isolation

• Dietary changes

• Climate change

What is the next step in Gilbert's research on Heliconius butterflies?

• Studying their migration patterns

• Identifying genes responsible for color and mate preference

• Observing their feeding habits

• Analyzing their wing structure