In this lab, we explore the effects of natural selection on a snail population in two separate

According to Darwin and his theory on evolution, organisms are presented with nature’s challenge of environmental change. Those that possess the characteristics of adapting to such challenges are successful in leaving their genes behind and ensuring that their lineage will continue. It is natural selection, where nature can perform tiny to mass sporadic experiments on its organisms, and the results can be interesting from extinction to significant changes within a species.

How does the change in the alleles affect the pigment in the alligators; which also affects the fitness of the animal?

The purpose of this lab is to better understand the process of natural selection and its effects on a population by conducting a stimulation. The stimulation consist of predators (students with either a spoon, fork or a knife) and prey (different types of beans). Furthermore, students will be able to determine how phenotype (bean color and utensil used by the predators) influences natural selection. Students will also demonstrate their quantitative skills by determining the predator survival and reproduction, bean survival and reproduction, and by calculating the total percent of the population. Additionally, students will be able to identify the occurrence of evolution by natural selection after the end of generation three. Moreover, students

The Evolution Lab simulates environmental situations to determine effects on evolution over periods of time. This lab experiments with the evolution of finches on two different islands over 100, 200, and 300 years. By manipulating parameters that influence natural selection, the effects that natural selection have on the evolution process can be studied.

It also produces mucus to help get over rough surfaces (Schultes n.d.). Obviously, moving is one of the fundamental ability of any organisms and it is especially important for grove snails. It relies on movement to obtain food, find mate, escape predator and to survive hot summer (Jaremovic & Rollo 1978). However, movement of grove snail also caused polymorphism among its population by frequent migration (Lamotte 1959). Although it is indirectly affected, the frequent migration allows grove snails to keep a broad variance of genotypes and produce five different shelled groves snails that thrive in different kind of environments. Interestingly, it is observed that grove snails exhibit certain behaviours when facing a dry and hot environment ((Jaremovic & Rollo 1978). They will move vertically to avoid this types of unfavorable condition. Grove snails will typically find an underground shelter or climb onto a plant. In some cases, they go up as high as 2.5 meters on some

Majority of mice in New Mexico’s Valley of Fire have dark color. The population increase of dark-colored mice in Valley of Fire happened because of natural selection. Mice that do not suit the environment, which are light-colored mice, cannot survive in Valley of Fire because they are easily noticed on dark soil by the predators. On the other hand, dark-colored mice can hide easily on dark soil, which made them survive. Whereas the mice near the desert are mutated, those near the lava are not mutated. Each mouse from different lava found to have a different gene. Whereas the mice near the desert’s color change was from a random mutation, that of the mice near the lavas was not random. Because, each dark-colored mouse from two different lavas

As the name suggests, the African Land Snail is from Africa originally. It was not intended to be in other countries, like the United States. They were accidentally transported when they got into, cargo boats and planes without people noticing. It is illegal to have these snails as pets in the US so people started to smuggle them in, to sell them on the black market. The African Land Snails are not normal sized snails. They can grown to be about eight inches long, the cone-shaped shell can have about nine spirals and is much larger than normal snails. Its shell can be a range of colors depending on where it is. It can be brown, yellow, or reddish with different markings on each one. When the African land snail lived in Africa it lived in areas

In order for natural selection to take effect with coat coloration of rock pocket mice that live on New Mexico’s Valley of Fire’s lava flows, conditions were met that are necessary and sufficient for evolutionary change. These conditions relate with variation. With variation, the coats of the mice must be heritable, and have a distinctive mortality (Study Week 4). The variation occurs here with the two different colours of fur; dark and light. These colours came from slightly different genes over time that controls their pigment. This mutation has heritability because the dark mice coat has enough of an advantage for staying alive that their offspring had more offspring and so on; eventually leading to natural selection weeding out the mice

By comparing the observed heterozygosity of two Blanding’s turtle populations, it was determined that Area 1 had significantly greater observed heterozygosity than Area 2. The lower observed heterozygosity found in Area 2 may have been caused by the founder effect, resulting in a loss of genetic variation. The founder effect occurs when a new population is established by a small group of migrants from a larger population. The founder effect involves a random sampling of alleles during the reproduction of consecutive generations; when a small population is isolated, it may amplify the loss of genetic variation as individuals may become increasingly genotypically similar after each subsequent generation. Eventually, the alleles may become fixed

Overtime, a population may grow, develop and interact with its environment. During that interaction, different mechanism such as evolution may occur. Evolution which is the change in allele within

The phenotype of an organism is the outward expression of its genotype and possesses different alleles for each gene. Alleles code for different traits and are either dominant or recessive, mutant or wild-type. Natural selection acts against different alleles, organisms, and populations forcing them to adapt and survive. The stronger the natural selection, the weaker the impediment from gene flow. Geographic variations also have an impact on an organism's natural selection through migration— emigration vs immigration. In this paper, Hoekstra et al (2014) studied the organism Chaetodipus Intermedius (pocket mice) and the effects of natural selection.

Even in same communities, these snails can have drastically different morphological differences (Goodhart 207). This is difficult to eliminate from an experiment, as the species can vary in itself. In Trial 2, there was more biological variation in the species than in Trial 1. One snail in Trial 1 did not move at all during the time it was observed. Also, snails in Trial 1 were more similar in size than in Trial 2, where there were larger differences in shell color and size. There may be a possibility that these differences may differed the mean values of the data and caused a source of

In this lab, we were given the task of modeling the process of natural selection. Natural selection is when an environment poses obstacles and chooses to favor a certain trait over another. We created fake paper “birds” for this model, with straws and construction paper. This lab showed was both accurate and helpful and not so accurate.

The theory of evolution discusses, with considerable proof, the history of life on earth and how biological populations have changed and developed over successive generations. Despite the abundance of evidence for evolution, both scientific and physical, some still doubt the validity of this theory. However, once compared with the alternative theory of creation, it is apparent that evolution is the most probable explanation for the origin of life on earth, to date. This essay will explain a handful of theories which provide proof for evolution as well as some of the most compelling genetic evidence to support the theory. The ability for organisms to adapt and mutate on a genetic level, reproduce to carry on only desired traits, as well as

SC.5.L15 asserts that Earth is a home to a great diversity of living things whose survival depends on the changes in the environment. However, individuals of the same kind usually differ in characteristics, and such differences give individuals an advantage to survive and reproduce in certain environments (CPALMS, 2015).