https://padlet.com/lindseyhackworth23/r8w9uu5wkc13 Natural Selection en-us 2019-02-05 15:21:39 UTC 2026-02-05 22:41:59 UTC hello@padlet.com lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327825506 Which mechanism of microevolution caused the beak of the Medium Ground Finch population on Daphne Major to increase in size from 1976 to 1978]]> 2019-02-05 15:29:04 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327825506 lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327827641 Natural selection is the mechanism of microevolution that caused the beak of the Medium Ground Finch population on Daphne Major to increase in size from 1976 to 1978.]]> 2019-02-05 15:31:45 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327827641 lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327828022 On Daphne Major there was a drought and the rain fall decreased to only about 20 mm of rain in 1977. 
*This evidence came from Lab 18 Data sheet, picture came from Google*]]> 2019-02-05 15:32:17 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327828022 lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327828372 Before the drought in 1976 the Portulaca population was 8 in January, but due to the drought the Portulaca population decreased to 0 in January of 1978. The Finch with small and thin beaks no longer had the soft Portulaca seeds as food.
*This evidence came from Lab 18 Data sheet, picture came from Google*]]> 2019-02-05 15:32:47 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327828372 lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327828507 In 1976 the population of the Ground Finches were 751. But, in 1978 the population of the Finches on Daphne Major decreased to 90 of 243. *This evidence came from the Lab 18 Data sheet, Picture came from Google*]]> 2019-02-05 15:33:00 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327828507 lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327828946 The reason why the drought proves my claim is because the average rainfall between the two years was only 230 mm of rain. The amount of rain was not enough to keep the Portulaca seed around, so it died. The drought started the natural section (the ability to survive and reproduce) in the Finch population because the food source available needs a different sets of traits, the long and thicker beak, which some did not have at the time. Natural selection weeded out or killed off the Finches with short and thin beaks because they could not survive, and only the Finches with thick and long beaks, the trait needed for survive and eat the available food, were left. Those Finches then began to reproduce and pass the traits needed to survive to their offspring. So, natural selection is the microevolution that occured.]]> 2019-02-05 15:33:36 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327828946 lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327829243 The reason why the evidence 2 proves my claim is because the seeds were the food source of the Ground Finches. The Portulaca seeds were soft and easy to get, so the Finches had no need to eat the tribulus seed which were large and hard seed. But, when the drought began the population of Portulaca seeds dropped to 0 and the small and thin beaked Finches no longer had any food source because they couldn't eat the Tribulus seeds, this is when the natural section began to start. Natural selection occurs when there is a variation in a trait among the individual in a population. The trait affects the survival and/or ability to reproduce. Since the small and thin beak Finches had no food they did not survive and where not selected, but the ones with larger and thicker beaks could survive and eat the harder seeds. This is why it proves my claim.]]> 2019-02-05 15:34:01 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327829243 lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327829379 The reason why evidence 3 proves my claim is because natural selection chose the Finches only with thicker and longer becks. They survived because to eat the only plant that survived, tribulus, a harder seed to eat, you needed thick and long beaks to eat this seed. The population did drop because the one with without long and thick beaks died since there was no foods source, but the ones that are left now can reproduce offspring with beaks that will help the survive in their environment. The gene passed on will carry the thick and large beak trait.This is why it is natural selection because it wasn't a random trait, mutation, luck, genetic drift, or migration because they didn't move.]]> 2019-02-05 15:34:13 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327829379 lindseyhackworth23 https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327832817 2019-02-05 15:39:12 UTC https://padlet.com/lindseyhackworth23/r8w9uu5wkc13/wish/327832817