Natural Selection Study Sample

Charles Darwin , a naturalist, discovered and stated that organisms arise and grow and develop through the natural selection. Natural selection is the process in which nearby organisms well adapted to the environment to survive and to produce offspring.

Directional selection and disruptive selection differ because instead of the subject only going in one direction it will split off and go two different ways for example if some flowers and their colors. The main colors may be red, pink and white primarily, and the more dominate color being a pink flower. But if we remove the pink flower completely from the equation then the flowers will shift toward the dominant white color over the red. In a directional selection there is only one trait and it is always that dominant trait that dictates body of the population. The best example to show this is that in the area that giraffes live in the vegetation is in the higher trees so the giraffe has adapted a neck that is long enough to reach the vegetation that is crucial to its survival. It’s a lot like being graded on a curve where Directional selection is only going to have one peak to its curve but disruptive would have two peaks.

Evolution is the process of change over time. It can be split in two questions, how did something living come from something that was not alive? And, how did things that were already living turn into other living things? Natural selection is when the “breeder: is the environment. This belief of natural selection came from Charles Darwin. Many ideas led him to believe what he believed. One of them was, James Hutton’s ideas about geological change. His theory consisted that sediments, rocks, soil, etc were made after the great flood and new species “rose” from that disaster and that it’s a cycle. Charles Lyell’s theory also shaped his thinking. Lyell wrote the book of “Principles of Geology”, where Hutton became famous. He believed that the earth

I took my first AP class during my sophomore year. The class was AP Biology which was incredibly difficult, but with hard work I was able to succeed. The year after I decided to enroll in AP Chemistry. I thought that if I was able to succeed in Biology, I would have no problem succeeding in Chemistry. The first week of junior year arrived along with AP Chemistry. The first week was relatively easy and I had no worries, but then the second week came along and changed my perspective of the class. The heavy amounts of math were not my favorite. I was sufficient in math, but this was more complex than any other math I had experienced before. I struggled on the first couple of quizzes and tests. I started to become discouraged with my capabilities.

In the article “Evolution as Fact and Theory” Stephen Jay Gould who is one of the leading theorists in evolution argues that the debate between evolutionists and creationists is pointless since creationists’ arguments lack support and evidence. Gould writes that creationists’ main argument is that evolution is only a theory. However, Gould states that it is not only a theory but also a fact. He suggests that humans evolved from apelike— whether or not is happened by Darwin’s mechanism. What Gould is saying is that there is more than enough evidence to support the theory of evolution and the question that scientists are trying to answer is how exactly all living organisms are linked. It makes him sad to realize that his colleagues find it easier

Did the mice start out with a light colored coat or with a dark-colored coat?

The documentary Darwin’s Nightmare focuses on the issues and exploitation which plagued underdeveloped African countries but mainly focuses on Tanzania by showing how the people of the developed countries utilize, take control and gain the wealth of the poorer countries. The documentary makes it perfectly clear about what hardships the Tanzanian people face daily such as prostitution, hunger, homelessness, corruption like the illegal weapons that are being traded in Lake Victoria, and pollution. On the other hand Paul Collier gives an insight on why the poorest countries fail and what can be done about it. There is also Jeffery Sachs who explains his eight reasons for economic failure.

The lab that I chose to do was the “McGraw Hill Higher Education: Natural Selection - Virtual Lab.” I chose this lab because it was the one that most interested me, as I liked the format of the virtual lab. In this lab, I was able to manipulate both the environment and the allele frequency in order to record and investigate the generational breeding patterns of a group of organisms. The lab starts with me being able to choose from four different environments that I want to put my organisms in. I also get to choose one of the four different allele frequencies that are allowed. I can mix and match the environment and frequencies however I want to. After picking an environment and a frequency, I then am able to move one generation forward. When I move a generation forward, the allele frequency will change. The reason for this is because the organisms with the least helpful phenotypes will be eaten by predators while the organisms with the better phenotypes will live on to breed, thus shifting the gene pool to go in a certain direction. I am able to move a total of 5 generations forward and each and every time I move the allele frequency will change to favor the superior phenotype, thus representing the

There are 2 types of worms: worms that eat at night (nocturnal) and worms that eat during the day (diurnal). The birds eat during the day and seem to be eating ONLY the diurnal worms. The nocturnal worms are in their burrows during this time. Each spring when the worms reproduce, they have about 500 babies but only 100 of these 500 ever become old enough to reproduce.

Modeling is an important tool to test if the reintroduced animal has a chance to succeed and thrive in an area where it vanished. Factors that we now know can be but into that model, such as the relationship that the lynx has with its keystone prey, the Snowshoe Hare (Lepus americanus). Prey abundance is an important factor in the predator – prey relationship of the lynx and hare. Studies have shown that for the lynx to succeed there needs to be a hare population of 1.1 to 1.8 hares (Steury, 2002) The next set of studies that went into the success of the lynx was the study that took into account that the lynxes chooses a habitat that best suits its prey. The best type of habitat for Snowshoe Hare are the mature spruce-fir forests. (Ivan, 2012 Density ShH) The lynxes preferred habitat coincides with the hares, or very close to, mixed spruce-fir, aspen forests. (Ivan, 2010 LH) By first finding other areas in Canada and Alaska where the Canadian Lynx (Lynx canadensis) and its keystone prey co-habitat harmoniously, the modeling fit quite well to reintroduce the lynx back into the San Juan Mountains. Habitat is an important focus on keeping the lynx in an area where it can be thrive but there has to be another focus too. This animal has a large home-range and also needs to have corridors set up for breeding purposes. The study of Predicted Habitat in Colorado, Ivan 2011, tried to predict the habitat north of the San Juan Mountains to determined if the Lynx would be able to not only have a corridor to the other northern states but also to have breeding sites. The determination was that they could not with any accuracy predict that the Canadian Lynx (Lynx canadensis) could use the land due to the landscape being so different than the Southern areas. Also the lack of information on the vegetation for the Snowshoe Hare (Lepus americanus) is critical. The

In this essay I will discuss Flanagan’s reasons for believing consciousness is an adaptation, I also will discuss why sleep is an adaptation and his stance on dreams being spandrels. And I will end with my opinion on why dreams may or may not be significant based on Flanagan’s theory and the treat simulation theory. I will also discuss the reasons why or why not dreams may have an evolutionary function. As well as Freud’s view on what a dreams function could be. Lastly I will discuss how dreams sooth the soul before death.

2.What part of the article most highlights the connection between loneliness and the potential effect that has on the basis of social behavior, specifically bullying? In your answer make sure to briefly explain the connection.

The text that I found most interesting was The End of the Wild because the author Stephen M. Meyer manages in 97 small pages to offer an extremely powerful argument and dissection of the biodiversity predicament us humans are in. He paints a grim picture of the loss of the wilderness. Calls the wilderness “a landscape where the handprint of humanity is invisible” and “where the forces of natural selection smother those of human selection.” (8)

"Every year more than 6 million lost, abandoned, or unwanted dogs and cats enter animal shelters"(Campanion Animal Overpopulation). This is why shelters are overcrowded. Shelters do not have the funding they need to keep so many animals healthy and adoptable. The No Kill Advocacy thinks that shelters do not want to help get their animals adopted out(No Kill Equation). Most shelters go above and beyond to try to find these animals good homes. They go to pet stores with some of their animals and host parties with their animals where you can go and see them and adopt them and get them or your own animals microchipped and spayed or neutered for cheap.

In order to have change in the inherited traits of a population of organisms throughout successive generations we need mutation, gene flow, genetic drift, and natural selection. Most of these inherited traits will have an effect from the environment the organism lives in.