Part 1 Analysis:
Claim/hypothesis:
"Individual with better traits leave more offspring."
My group and I did a experiment using different kind of utensils, that resembled and represented different kinds of beak of birds, to test which beak would collect the most "food" (Macaroni "seeds", Paper clips "seeds", Rubber bands "leaves", and Toothpicks "seed pods"), thus have more offspring. We had three different trials and in the end we got our results. The tweezers beak bird had a total of 25 chicks, the scissors beak bird 14, the binder clip beak bird 18, and the spoon beak bird 9. This supports the claim because it shows how individuals with better traits, in this case the tweezers beak bird and binder clip beak bird, do produce more offspring than individuals with worse traits, the scissor beak bird and the spoon beak bird. The tweezers beak bird and binder clip bird would produce more offspring than the scissor beak bird and the spoon beak bird because they collect more food, with the help of their better traits, which means that they could have more chicks to feed that extra amount of food to.
"Populations begin to look more like the winners."
From the experiment described in the first CER paragraph, we collected data showing how out of 100% (the population), from the order of individuals with better traits (the winners) to ones with worse traits (the losers), the percentage of chicks in the population from the different beak birds were: the tweezers beak bird boasting 37.9%, the binder clip beak bird with 27.3%, the scissor beak bird with 21.2%, and lastly, the spoon beak bird with only 13.6%. This supports the claim that populations begin to look more like the winners because it shows how out of the whole population (100%) the birds that covered it more were the birds that had won (have better traits, therefore collect more food, thus have more offspring), in this case the tweezers beak bird and the binder clip beak bird, each covering more than 1/4 of the population.
Part 2 Conclusion:
The question of this lab was: "If natural selection occurs in a population, how do changes in selective pressures affect the evolution of that species?" To that question, my hypothesis is: If a famine hits in the area and in order to survive there needs to be 10 items of food for each offspring, then there will be less offspring overall. My group and I carried out the experiment again, getting new results. Overall there were less offspring, this time instead of having a total of 66 offspring like how before the famine hit, there were only 29 chicks. This supports my claim of there being less offspring overall because my evidence shows how the number of chicks decreased drastically, lessening more than half. The number of chicks overall probably decreased so much because the amount of food needed in order to survive increased and this makes the competition between the different beak birds harder, thus the result of less chicks for each bird (since there is now technically less food for every bird).
An error that could've occur in this lab is the miscount of rubber band "leaves" for the scissors beak bird due to them cutting some of the bands in half (or even more), resulting in them having twice (or more) the actual "leaves" they have. To minimize this error, thicker rubber bands can be used, making it harder for the scissors beak to accidentally cut them. A second error that could've occur in this lab is miscounting of the amount of food. Anyone could've easily accidentally skipped a number or two when counting their amount of food and this could've have lead to them writing down that they have more chicks than they actually do. To minimize this error, when doing this process students can slowly and quietly (in order to not be a distraction to others also counting) count two times, in order to make sure that their number's correct.
The purpose of this lab is to help us understand what Mr.Orre taught us in the vodcasts: Darwin's 4 observations and how natural selection causes evolution. Natural selection causing evolution occurs everywhere in our lives constantly, including in our own human race. As each generation of humans pass by, it is said that we get more and more attractive overall. This is so because those already attractive attract others that are also attractive, leading to them both mating and birthing a child that have their attractive traits.
The question of this lab was: "If natural selection occurs in a population, how do changes in selective pressures affect the evolution of that species?" To that question, my hypothesis is: If a famine hits in the area and in order to survive there needs to be 10 items of food for each offspring, then there will be less offspring overall. My group and I carried out the experiment again, getting new results. Overall there were less offspring, this time instead of having a total of 66 offspring like how before the famine hit, there were only 29 chicks. This supports my claim of there being less offspring overall because my evidence shows how the number of chicks decreased drastically, lessening more than half. The number of chicks overall probably decreased so much because the amount of food needed in order to survive increased and this makes the competition between the different beak birds harder, thus the result of less chicks for each bird (since there is now technically less food for every bird).
An error that could've occur in this lab is the miscount of rubber band "leaves" for the scissors beak bird due to them cutting some of the bands in half (or even more), resulting in them having twice (or more) the actual "leaves" they have. To minimize this error, thicker rubber bands can be used, making it harder for the scissors beak to accidentally cut them. A second error that could've occur in this lab is miscounting of the amount of food. Anyone could've easily accidentally skipped a number or two when counting their amount of food and this could've have lead to them writing down that they have more chicks than they actually do. To minimize this error, when doing this process students can slowly and quietly (in order to not be a distraction to others also counting) count two times, in order to make sure that their number's correct.
The purpose of this lab is to help us understand what Mr.Orre taught us in the vodcasts: Darwin's 4 observations and how natural selection causes evolution. Natural selection causing evolution occurs everywhere in our lives constantly, including in our own human race. As each generation of humans pass by, it is said that we get more and more attractive overall. This is so because those already attractive attract others that are also attractive, leading to them both mating and birthing a child that have their attractive traits.
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