Bio 100 Homework due 11/05/12 Name : Nicholas Oliveira Go to the website on cheetah conservation www.Cheetah.org and read the following sections under the tabs About Cheetahs: Intro, Genetic Diversity, & Race for Survival 1. Why are cheetahs endangered? Our attitudes and misconceptions about these species have led to their endangerment because many people deal with their fear by eliminating predators. 2. What are the 5 most common causes of extinction?
Nurture on the other hand is a view, is a view proposed by the social approach suggesting that behavior is affected by socialization and environment. The natural and sexual selection in the evolutionary approach are two important factors to account for the survival of the fittest. When there is a change in the environment, a danger, a situation which needs quick adaptation to survive, the individuals who adapt the fastest and the better are the ones to survive and therefore to pass on their genes onto the next generation. The individuals that fail to adapt die, and their genetic makeup is lost. In the sexual selection, individuals from every sex have genes, which provide them with attractive characteristics to attract the
Change in bigger things that alleles. --------------------------OR----------------------------- How they contribute to speciation (process by which new species arise) Geographical barriers 1. Barriers refer to natural barriers like oceans and mountains that separate two populations of the same species from potentially mating. This means that over time, the populations will slowly evolve differently until they can no longer interbreed. 2.
(You may do more than one opposing view) One viewpoint that differs from mine is reduced effectiveness of pesticides. Just as some populations of mosquitoes developed resistance to the now banned pesticide, many people are concerned that insects will become resistant to other crops that have been genetically-modified to produce their own pesticides. 7. If your viewpoint was followed, what would be the implications and consequences (good and bad) for appropriate stakeholders and all of
While traditional farming choose to grow organic produce and struggle to keep their businesses alive. In Jeffrey M. Smith book, Genetic Roulette the intro talks about the experements they had with animals and the GMO foods. Many of the animals organs were becoming defecting or mutated over time. After looking at the results, animals that consume the modifications continusly it can lead to serious health risks. In addition the animal’s lifespan was shortened and their offspring a lower chance of survival.
Meaning that 88% of them have completely gone extinct. The article continues to mention that the last 12% of the bird species may go into extinction within the next century. Many birds are going into extinction mostly because of threats humankind are causing these poor creatures. These birds are facing threats such as "habitat loss, human disasters, and disease." I feel that "extinction" is not something that has to happen, but happens because humans do not take care of the natural world, the way they should.
Historically, they have been approached through one of two perspectives. First, the nature perspective suggests that human behavior is driven mostly by biology (evolution, genetics, brain chemistry, and hormones). In contrast, the nurture perspective suggests that behavior is driven mostly by the psychosocial environment (for example, how we were raised, our peers, the situations we are in at present). Interestingly, almost everyone in our culture seems to believe that nurture is more powerful than nature. More than likely, this is because it is easier to observe the effects of nurture in our lives (personal experience), because we have been told that nurture is more powerful in our culture (authority), and because it feels more empowering to believe that nurture has more of an effect, perhaps because it seems more controllable (bias).
In 1964, Hamilton introduced the concept inclusive fitness. The term includes the classical notion of fitness; the number of offspring an individual can produce and support. In addition it also comprises of the amount of gene related individuals an organism can add to the population by supporting others. (“Inclusive Fitness”, 2004) This means that it sometimes can be beneficial for an individual’s inclusive fitness to sacrifice herself for other individuals, if there is a blood kinship between the individuals. If you endanger yourself for your children or close relatives you may die, but if your children or your close relatives live, your inclusive fitness may increase.
How can we prioritise species for conservation? Species becoming extinct: Species are facing various problems key to their survival such as destruction of animal habitats, damage to the natural environment of living things, for example trees are cut down to build homes, , Oil spills, acid rain and water pollution also add to the destruction of habitats. Moreover another cause for extinction is when animals are over-hunted for their meat, fur and other valuable parts. Another cause could be ‘when animals or plants arrive into a new habitat from a foreign place they sometimes introduce diseases that the native species can't fight. These "exotic" species can also prey on the native species’.
* Even though certain species are beneficial from global warming, a lot of more species are threatened by it. Conclusion: * Climate change will more likely to result in extinction of species, but through long periods of time. [ 1-8 ] References 1. Adams, R. A. Bat reproduction declines when conditions mimic climate change projections for western North America.