Beakman explains that giraffes have long necks so they can eat leaves out of trees. He mentions that heredity has caused them to all have long necks. He then pretends to be Charles Darwin, who explains how natural selection caused the long necks in giraffes.
Hank provides background information on the biologist who contributed to evolutionary history: Charles Darwin. He also explains the four principles of Darwin's idea of natural selection, which are variation, heritability, struggle for existence, and survival and reproduction rates.
Key Words: Genetic Drift, Fitness, Variations of Phenotype, Heritable, The Struggle for Existence, Survival and Reproduction Rates
This clip describes how genetic mutations can lead to an animal's advantage in survival. Neil deGrasse Tyson talks about a Black bear that turns into a white bear because of a genetic mutation, which later became known as polar bears.
Mr. Burns makes a political campaign to rally the support of his peers. While doing so, he introduces his three-eyed fish, Blinky, then summons an actor portraying Charles Darwin to explain the concept of evolution.