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Explore the fascinating concept of natural selection through hands-on learning with Lego robots. By constructing different "Evobots" adapted to various environments, participants will observe how organisms evolve traits that enhance their survival and reproduction. Each Evobot will be designed to thrive in specific challenges like speed, climbing, or resource efficiency. This interactive lesson highlights the evolutionary journey from ancestral forms to specialized adaptations, teaching valuable insights into adaptation and environmental fitness.
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Natural Selection • Natural selection is a process that causes heritable alleles that are helpful for survival and reproduction to become more common, and harmful alleles to become more rare. • This occurs because organisms with “better” alleles pass on more copies of these heritable traits to the next generation
Adaptations • Adaptations are the characteristics that give individuals better chances of surviving and or reproducing.
Car #1 What is this car adapted for?
Car #1 Adapted for s p e e d
Car #1 This Pronghorn Antelope is also adapted for speed. Adapted for s p e e d
Car #2 What is this car adapted for?
Car #2 Adapted for CLIMBING
Car #2 This big horned sheep is also adapted for climbing. Adapted for CLIMBING
Car #3 What is this vehicle adapted for?
Car #3 Adapted for water and land-- amphibious
Car #3 This tiger salamander is also adapted for a life in both land and water. Adapted for water and land-- amphibious
Car #4 What is this vehicle adapted for?
Car #4 Adapted for safety and protection
Car #4 This desert tortoise is also adapted for safety and protection. Adapted for safety and protection
Car #5 What is this vehicle adapted for?
Car #5 Adapted as a generalist. It’s good at a lot of things but not great at any.
This coyote is also a generalist. It is medium speed, ok at climbing… Car #5 Adapted as a generalist (speed, protection, climbing…)
Car #6 Toyota Prius (Hybrid)
Car #6 Toyota Prius (Hybrid) Adapted to use less resources
This kangaroo rat also survives with few resources. Car #6 Toyota Prius (Hybrid) Adapted to use less resources
The Ancestral State • This is a photo of the first car, a Model-T Ford. • All the cars we just looked at evolved from this original
All the cars have a common ancestor but are now adapted for different environments. The Ancestral State Notice how the Toyota Prius evolved from the Toyota Camry. This is a more recent ancestor for the Prius.
A Tale of Intermediate Forms • When looking at a 1909 Model-T Ford and a 2010 Ford Mustang it is hard to see how we got from one to the other– they look so different. ?
A Tale of Intermediate Forms • However, if we look at the history of cars, we get a better picture 1909 1920
A Tale of Intermediate Forms 1909 1920 1927
A Tale of Intermediate Forms 1909 1920 1927 1932
A Tale of Intermediate Forms 1909 1920 1927 1932 1938
A Tale of Intermediate Forms 1909 1920 1927 1932 1938 1948
A Tale of Intermediate Forms 1909 1920 1927 1932 1938 1948 1952
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960 1964
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960 1964 1968
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960 1964 1968 1975
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960 1964 1968 1985 1975
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960 1964 1968 1975 1995 1985
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960 1964 1968 1975 1985 1995 2005
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960 1964 1968 1975 1985 1995 2010 2005
1909 1920 1927 1932 1938 A Tale of Intermediate Forms 1948 1952 1960 1964 1968 1975 1985 1995 2005 2010
Evobot Lesson • Together we will all build an ancestral state. • Then, you will have 30 minutes to develop a Evobot to compete in a specific environment.
Environments • Flats (The fastest evobot has the advantage) • Mountains (The evobot that can climb the steepest hill has the advantage)
Environments • Founder (The evobot that is completed first has an advantage) • Desert (The evobot that uses the least legos or resources gains an advantage) • Reproduction (The best looking evobot and the weirdest looking evobot gain an advantage)