In this lab, we learned about natural selection through investigating which types of bird beaks ate the most food, and whether they could stand environmental stresses.
In this lab, we asked the question of whether individuals with better traits leave more offspring. We found out that the spoon beak bird ate the most food and therefore had the most amount of offspring. 23 chicks of the spoon beak were born, 39% of the total amount of chicks born. This was compared to 22 chicks of the tweezer bill, 37% of the total population, and 14 chicks of the scissor beak, 24% of the total population. This was expected, because the spoon could easily scoop of large amounts of food. The data supports our claim because the spoon bill ate the most food and had the most offspring.
In this lab, we asked the question of whether populations begin to look more like the winners. We found out that the spoon beak bird ate the most food because of its better traits. As a result, the spoon beak bird had the most offspring. 39% of the total amount of offspring were of the spoon beak type. This compares to 37% of the total populations were of the tweezer bill type and 24% of the total population that were of the scissor bill type. This makes sense, because since the spoon beak bird was able to eat the most food because of its favorable traits. Since the spoon beak bird ate the most food, they were able to have the most offspring.
In this lab, we asked the question of if natural selection occurs in a population, how do changes in selective pressures affect the evolution of species. We discovered that since the tweezer bird was most adept to our selective pressure, a diminished food supply, the population gradually started looking like tweezers. This makes sense, because since the tweezer bird had an advantage over other birds, it was able to eat the most food, and therefore have the most chicks. The other types of birds would gradually die out, because their genes were not as favorable as the tweezer bird. The data supports our claim, because the tweezer bird had 12 chicks, compared to 11 by the spoon bird and 7 by the scissor bird.
While our hypothesis was supported, there could have been errors due to uneven distribution of food and lack of significant space to conduct the experiment. An uneven distribution of food could have helped an individual who was really good at collecting one type of food, but not another. Next time, we should make sure that there is equal numbers of the different foods in the distribution. Our second problem was a lack of space to conduct the experiment. Since there was 3 of us, and only a small area where the food was, we ended up fighting with each other to collect food. This led us to not having the greatest results. A possible solution to this is having more food on the table.
This lab was done to demonstrates Darwin's idea of natural selection. From this lab, we learned that natural selection actually works, it is not just an idea. From this lab, we learned about the big picture of evolution. Normally, evolution takes millions of years. We got to see the results of evolution in just one class period. Doing these labs helps you get a better grasp on abstract ideas. Based on my experiences with this lab, I could conduct a similar lab, except with different beaks and food.
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Hypothesis(Claim)
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Evidence of this occurring?
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Explanation
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Individuals with better traits leave more offspring
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The spoon bird had 39% of the population of chicks
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Since the spoon bird’s superior traits allowed them to eat more food, they were able to have more chicks.
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Populations begin to look more like winners
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39% of the chicks were spoon birds
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Since more chicks of the individuals with better traits are produced, the population starts to look like them.
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In this lab, we asked the question of whether individuals with better traits leave more offspring. We found out that the spoon beak bird ate the most food and therefore had the most amount of offspring. 23 chicks of the spoon beak were born, 39% of the total amount of chicks born. This was compared to 22 chicks of the tweezer bill, 37% of the total population, and 14 chicks of the scissor beak, 24% of the total population. This was expected, because the spoon could easily scoop of large amounts of food. The data supports our claim because the spoon bill ate the most food and had the most offspring.
In this lab, we asked the question of whether populations begin to look more like the winners. We found out that the spoon beak bird ate the most food because of its better traits. As a result, the spoon beak bird had the most offspring. 39% of the total amount of offspring were of the spoon beak type. This compares to 37% of the total populations were of the tweezer bill type and 24% of the total population that were of the scissor bill type. This makes sense, because since the spoon beak bird was able to eat the most food because of its favorable traits. Since the spoon beak bird ate the most food, they were able to have the most offspring.
In this lab, we asked the question of if natural selection occurs in a population, how do changes in selective pressures affect the evolution of species. We discovered that since the tweezer bird was most adept to our selective pressure, a diminished food supply, the population gradually started looking like tweezers. This makes sense, because since the tweezer bird had an advantage over other birds, it was able to eat the most food, and therefore have the most chicks. The other types of birds would gradually die out, because their genes were not as favorable as the tweezer bird. The data supports our claim, because the tweezer bird had 12 chicks, compared to 11 by the spoon bird and 7 by the scissor bird.
While our hypothesis was supported, there could have been errors due to uneven distribution of food and lack of significant space to conduct the experiment. An uneven distribution of food could have helped an individual who was really good at collecting one type of food, but not another. Next time, we should make sure that there is equal numbers of the different foods in the distribution. Our second problem was a lack of space to conduct the experiment. Since there was 3 of us, and only a small area where the food was, we ended up fighting with each other to collect food. This led us to not having the greatest results. A possible solution to this is having more food on the table.
This lab was done to demonstrates Darwin's idea of natural selection. From this lab, we learned that natural selection actually works, it is not just an idea. From this lab, we learned about the big picture of evolution. Normally, evolution takes millions of years. We got to see the results of evolution in just one class period. Doing these labs helps you get a better grasp on abstract ideas. Based on my experiences with this lab, I could conduct a similar lab, except with different beaks and food.
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