Determining the affects of natural selection on gall fly (Eurosta) larvae from different predators Ariel O’Neil Biology 1020H Abstract This lab was done with the objective of determining if directional selection causes early larvae death in the gall fly. By first examining the parasitoid wasp and birds predatory actions we can hypothesize and predict the smaller galls will be most likely to survive directional selection.…
1a. Figure C 1b. The reason Figure C is the best histogram for birds that survived is because Bumpus had suggested that birds that were unusually large or small were unable to survive the winter due to a natural selection he called, stabilizing selection. According to Bumpus, stabilizing selection "winnows out of the extremes and favors those in the middle..", supporting that the there is a relationship between the size of the birds' traits and their survival. Figure C shows the best representation of the living sparrows because of the high frequency of the 'average' trait.…
Introduction: In biology, evolution is the process in which different types of living organisms are believed to have developed and changed since its early stages during earth’s history. For instance, as a species evolves over time they begin to develop new traits though they also begin to lose other traits. Basically evolution is change. However, evolution is only seen as a reliable theory.…
After I read the article “Body Ritual among the Nacirema”, I find that Nacirema is a tribe of “magic-hidden people” (Miner 507). In the article, the author writes, “they are a North American group living in the territory between the Canadian Creel the Yaqui and Tarahumare of Mexico, and the Carib and Arawak of the Antilles. Little is known of their origin, although tradition states that they came from the east” (Miner 503). The author clearly states that the Nacirema live as a little-known North American group. They are really Americans, because I find that Nacirema spelled backwards is American.…
Natural Selection and Darwin’s Finches State the four criteria needed for natural selection to occur and provide examples/evidence from the article. Competition between individuals in the article was the over population of the offspring’s of the finches. There were thirteen species of finches that live on the island of Galapagos. There was also variation in population for these finches, which is other natural selection of occurrences.…
Gould and Lewontin argue that the adaptationist programme is a narrow view of evolution and should be expanded to incorporate other explanations. They claim that one of the key adaptationist arguments is “if one adaptive program fails, try another” (Gould & Lewontin 586). In this way, evolutionary biology focuses exclusively on researching and publishing material on adaptation. They propose that scientists should instead explore other avenues of discovery that may lead to alternative explanations, explanations that they overlooked by narrowly focusing on adaptation. Adaptationists typically claim that a trait has evolved because it is fit to the environment, whereas Gould and Lewontin argue that perhaps these traits are simply byproducts similar…
Charles Darwin created the theory of evolution, and through his books, made it public. While on his five year voyage, Charles visited the Galapagos Islands and noticed how each island seemed to have its own exclusive species of finch that were different from the ones on the mainland. Through this and other observations, Charles concluded that living things are always changing to adapt to their environment. After about 23 years after his voyage Charles published The Origin of Species. There was much controversy about it.…
But they started to evolve so they blended and matched the background and it was more difficult for predators to find them. Better beak, Means better chance of survival The different types of Finches have different types of beaks cause they eat different types of seeds, A Finch that has trouble picking…
The chapter is titled “What is evolutionary biology and where did it come from” so from that alone we know that the origins of evolution are to follow. A lot of things are mentioned in this chapter such as the heirchy of living things which is referred to as “The Great Chain of Being.” This idea was first introduced by Aristotle in ancient Greece, but is still used as a general mindset of how the biological and social food chain works to this day. There is a section that mentions a lot about finches which is true that they played an important role in Darwin’s studies, but it is not made clear that it was only after the book Darwin’s Finches was published.…
YR 10 Science Evolutionary Theory Alicia Horsfield Evolution can be defined as a gradual process in which a species changes into a different and more complex form. This happens over several generations. Evolution also proves that all species are related through genetic variation. (yourgenome.org, n.e). Charles Darwin (1809-1882) was an English Naturalist, famous for creating the theory of ‘evolution’.…
Overview Evolution is a theory originally thought of by a man named Charles Darwin. Darwin was surveying the land around South America to make maps and then discovered the Galapagos Islands. He noticed on these islands there were 14 different types of finches within a small archipelago. He concluded from this that originally there was one kind of finch on all the islands, but they evolved from the original so they could survive on their respective islands (Evolution).…
It is also true that many of the living things on earth now were not all existing during the past with dinosaurs, such as, birds and mammals. Since, dinosaurs don’t exist in the present time and birds do, then it must be correct that all life on earth evolved from previous ancestors such as birds from dinosaurs and humans from apes. On that note, Gould’s argument on evidences from the fossil records suggests one of the most famous example of fossil transition called Archaeopteryx. It is a genus of early bird that has a combination of feathers and structures of a bird with features such as teeth, pony tail, and legs of a small coelurosaur dinosaur. Additionally his third argument outshines the beliefs of creationist over the evolutionist because it questions that if God created human species long time ago, then why God added more modern features in a chronological sequence such as reducing face, teeth, and etc. to humans.…
The finch species diverged due to varying diets; some ate insects, leaves, flowers, seeds, even the blood of other birds. The original finch was a seed-eating, ground-dweller. The latter 14 species some were ground-dweller that ate seeds; some lived on cactuses and ate seeds, some lived in trees and ate seeds, and some lived in trees and ate insects. This data helped Darwin create his most brilliant idea known as natural…
Understanding how humans and other organisms have evolved is fascinating. Charles Darwin was the individual who developed the theory of natural selection. Natural selection is “the process by which species become better adapted to their local environments” (Witz BW 2004). Darwin arrived at this statement by observing the biological structures of organisms, formulating a hypothesis, testing his hypothesis and then using the evidence he discovered to support his…
Majority of people can walk outside and see an example of Darwin’s theory of evolution, and anyone can look in the mirror to see an example of his theory. Darwin found his first example of evolution on his journey through the Galapagos Islands. While on that voyage he discovered that there were finches on each of the islands; however, while these finches may have shared similarities they also had many differences. The main difference Darwin noticed was the finch’s beaks they were all different shapes and sizes. He later discovered that the beaks had changed to where they lived to help them get food and adapt to the environment on that island.…