Natural Selection Lab Report

Purpose:To find which birds with which beaks survive best in their environment depending on the type of nutrient available.

Question:What is the consequence of the type of nutrient available on the frequence of different types of bird beaks?

Hypothesis:If the nutrient type alterations in the environment. so the sum of each type of bird beaks will alter because birds with beaks more suitable to the available nutrient will be more successful over clip.

Birds Lab

Variables:The independent variable of the lab is the type of nutrient that is available to the birds.

The dependent variable of the lab is the frequence of each type-size and shape-of beaks.

Materials:100 helianthus seeds100 raisins100 grains of rice2 forks2 spoons2 knivesFictile cup

Procedure:1. Gather around the border of the tabular array fabric. blending the three groups reasonably equally. 2. Pick up nutrient pieces merely with your tool. utilizing the brace of utensils in one manus. imitating the action of a beak. 3. Pick up one piece of nutrient at a clip.

and put it in your cup ( “stomach” ) before picking another piece of nutrient. 4. Keep your organic structure off the tabular array fabric and pick up nutrient merely within your range. 5. Start merely when the instructor says “Go” and complete when all nutrient has been “eaten. ”

Data—Environment with Equal Sums of Insects. Seeds. and Fruit

Second GenerationFlock TenFlock YFlock ZInsects Eaten

353233Seeds Eaten344620Fruit Eaten78157Entire1479360Percentage49 %31 %20 %Fake Number of Birdsin Flock for 3rd Coevals1596

Data—Changed Environment with Equal Sums of Insects and Seeds but No Fruit.

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First GenerationFlock TenFlock YFlock ZInsects Eaten306060Seeds Eaten279330Entire5715390Percentage19 %51 %30 %Fake Number of Birdsin Flock for 2nd Coevals6159

Second GenerationFlock TenFlock YFlock ZInsects Eaten1510044Seeds Eaten178044Entire3218088Percentage11 %60 %29 %Fake Number of Birdsin Flock for 3rd Coevals3189

Analysis:Based on the information in the first table flock X consumes largely fruit. When fruit was taken off there was a lessening in the figure of birds that flock X contained. Flock Y consumes largely seeds. There was no consequence on flock Yttrium when fruit was removed. Due to the fact that flock Z eats largely insects. the flock was non affected by the remotion of fruit.


In this lab I learned about how favourable traits are of import when nature selects what being will last and go through down its cistrons for the following coevals to inherit. I besides learned that most species learn to accommodate to their environments so that they can hold a favourable trait to be able to last in their environment. I was able to detect that in the wilderness you need that favourable trait so that you are able to reproduce and go through down your genotypes for the following coevals of you species to inherit. I gained utile accomplishments such as how to find the following generation’s population by analysing consequences from experiments I conducted associating to the bird populations

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Natural Selection Lab Report. (2019, Dec 05). Retrieved from

Natural Selection Lab Report
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