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Bio 101 Evolution Lab Essay

907 words - 4 pages

Evolution Lab
BIO/101
Pooja Thakur
7-23-12

Evolution Resulting From Natural Selection

INTRODUCTION
The Evolution Lab simulates environmental situations to determine effects on evolution over periods of time. This lab experiments with the evolution of finches on two different islands over 100, 200, and 300 years. By manipulating parameters that influence natural selection, the effects that natural selection have on the evolution process can be studied.

HYPOTHESES
• The size of the island will influence the population.
• The amount of precipitation will influence beak size.
• Variances in beak size will influence beak size.

MATERIALS
The materials needed ...view middle of the document...

Then the data was collected after revisiting in 300 years. Then to test if variances in beak sizes from bird to bird influences the evolution of beak size, the variance on Wallace Island was changed from 1 mm to 2 mm. This test was also run for 300 years then the data was collected.

DATA Test 1
|Parameter |Darwin Island |Wallace Island |
|Initial Beak Size |12 mm |12 mm |
|Heritability |0.7 |0.7 |
|Variance |1 |1 |
|Clutch Size |10 eggs |10 eggs |
|Precipitation |20 cm |20 cm |
|Population |200 birds |200 birds |
|Island Size |0.5 km |1 km |
| |Results | |
|Year |Darwin Island |Wallace Island |
|2096 |578 |1107 |
|2196 |632 |1236 |
|2296 |689 |1458 |

[pic]

DATA Test 2
|Parameter |Darwin Island |Wallace Island |
|Initial Beak Size |12 mm |12 mm |
|Heritability |0.7 |0.7 |
|Variance |1 |1 |
|Clutch Size |10 eggs |10 eggs |
|Precipitation |20 cm |40 cm |
|Population |200 birds |200 birds |
|Island Size |0.5 km |0.5 km |
| |Results | |
|Year |Darwin Island |Wallace Island |
|2096 |18.79 mm |16.38 mm |
|2196 |22.38 mm |19.64 mm |
|2296 |25.27 mm |20.78 mm |

[pic]

DATA Test 3
|Parameter |Darwin Island |Wallace Island |
|Initial Beak Size |12 mm |12 mm |
|Heritability |0.7 |0.7 |
|Variance |1 |2 |
|Clutch Size |10 eggs |10 eggs |
|Precipitation ...

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