How did Kettlewell determine if some moths lived longer than others?

Answer 1

Kettlewell determined the lifespan of moths by trapping them in the wild and then marking them with small, harmless dabs of paint. By recapturing the marked moths at a later date, he was able to determine their lifespan by seeing how long they had lived since their initial capture. This allowed him to compare the lifespans of different moth populations and draw conclusions about their survival rates and behaviors.