Natural Selection Worksheet for Model Simulation

www.biologysimulations.com Natural Selection Name: Alyssa Shifflett, Delaney Gray Go to the Natural Selection Simulation on Biology Simulations Experimental Question: How does the environment affect the survival of these organisms? Procedure: 1. Click on “Introduction” to read about the simulation. 2. Write a hypothesis for each environment: a. Grassland: Neither blend in very well not allowing them to survive b. Mountain Rock: They gray will survive better because they will blend in with the rocks and they brown will stand out c. Desert Sand: The gray will stand out this time and then brown well blend in better 3. Run the simulation 3 times for each environment (desert, mountain, and grassland) and record your data. 4. Calculate and record averages for your data. 5. Complete the analysis and discussion questions.

www.biologysimulations.com Data: Grassland Environment Trial Starting % Gray Starting % Brown Ending % Gray Ending % Brown 1 48% 52% 44% 56% 2 48% 52% 47% 53% 3 60% 40% 55% 45% Average 52% 48% 48.7% 51.3% Mountain Rock Environment Trial Starting % Gray Starting % Brown Ending % Gray Ending % Brown 1 56% 44% 93% 7% 2 38% 62% 65% 35% 3 56% 44% 90% 10% Average 50% 50% 83% 17% Desert Sand Environment Trial Starting % Gray Starting % Brown Ending % Gray Ending % Brown 1 42% 58% 9% 91% 2 46% 54% 36% 64% 3 48% 52% 20% 80% Average 45% 55% 65% 78% Discussion: