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Evolution: Something's Fishy!

A model of fish in a pond eating algae. Click Setup to create algae, choose one of the Create Fish buttons, then Run to run the simulation. Answer the questions associated with each button description below.

Create Yellow Fish: only yellow fish will be created, so you can focus on overall population sizes.

Q: Why do the population sizes fluctuate over time? Is there a relationship between the two population sizes?

Create Multi-Color Fish: fish of 4 different colors will be created, but the colors are cosmetic only.

Q: Let the model run until only 1 or 2 colors are left. Then set up and run again. Are the same color(s) left? Why or why not?

Create Multi-Trait Fish: the different colors of fish will also have slightly varying rules for when they reproduce.

Q: Let the model run until only 1 or 2 colors are left. Then set up and run again. Are the same color(s) left? Why or why not?

Q: Is there something you could change about the environment or algae that might make a different color more likely to survive longest?



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