A Lesson in Survival of the Fittest

Holly Briggs’ biology students finished their study of evolution with a fun and informative lab designed to illustrate the effect of natural selection on populations of predators and prey. Students played the role of predators, each with a different adaptation for capturing their prey; the prey consisted of different species represented by different colored beans. Students were tasked with answering the question: How do the bird populations change in relation to available food sources over three generations?