Biology Week 3 Assignment

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Evolution Lab: Finches and Natural Selection
Antonio Joseph O. dela Merced
Principles of Biology
Instructor: Matthew Scholten

Evolution Lab: Introduction Evolution is a natural process in which animals adapt to their surroundings so that they may survive. There are many variables in an animal’s environment that influence its evolution. The purpose of this lab is to examine finches from the island of Darwin and the island of Wallace and how the island size, finches’ clutch size and the precipitation on both islands directly affect the finches’ beak size and population. I believe that a larger island size, larger clutch size and high precipitation will lead to a smaller beak size and larger population.

Evolution Lab: Materials The materials of this lab will consist of a computer and the Evolution Lab on the University of Phoenix student portal.

Evolution Lab: Methods and Procedures
In this lab, we will take the number of clutch size, island size and precipitation on Wallace island and double it for Darwin Island. First we will start by choosing our inputs for our lab on by clicking on the “change inputs” button. Finches on both islands will start with a beak size of 15mm. Variance of beak size on both islands will be 1mm. Heritability of finches on both islands will be 0.50. The clutch size on Darwin Island will be set at 20 eggs while the clutch size on Wallace Island will be 10 eggs.
Darwin Island will be 1 kilometer in size while Wallace Island will be 0.5 kilometer in size. The population size on both islands will be set at 300. Precipitation on Darwin Island will be 100 centimeters while the precipitation on Wallace Island will be 50 centimeters. As you can see, Darwin Island will be double what Wallace Island will be in clutch size, island size and precipitation. The time frame for this lab will be 100 years, which can be chosen at the bottom left hand corner of startup page.

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