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darwinian snails post-lab assignment

darwinian snails post-lab assignment - StephanieLennon...

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Stephanie Lennon Introduction to Biology – Lab Post-Lab Assignment: EvoBeaker – Darwinian Snails Part 1: Question:  Do the snails from the crab-infested environment have thicker shells, on average, than the snails  from the crab-free environment? Approach:  One can observe the histograms presented in the simulation to determine which environment,  the crab infested East Coast or the crab-free West Coast, has the greater average shell thickness.  Data a. The average shell thickness for snails in the crab-free environment (West) is 6. The  average shell thickness for snails in the crab-infested environment (East) is 10.  b. Histograms of each coast can be found in the results section at the end of this lab report. Conclusion:  Based on the data above and the histograms in the results section, the snails in the crab- infested environment have thicker shells than the snails found in the crab-free environment.  Part 2: Question:  Do the snail populations meet all three requirements for evolution by natural selection? Re-cap:   Requirements for evolution by Natural Selection: 1. The population contains variation for some character, AND 2. The variation is at least partly heritable, AND 3. Some variants survive to reproduce at higher rates than others Approach:   1. One can observe the histograms of the shell thickness in the East and West Coast  environments to determine if there is variation in shell thickness. 
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