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Natural Selection

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Introduction

Natural Selection 1. The number of prey decreases whilst the number of predators remains constant however, there might be an increase in the population of the fittest predator even though the total number would not change. In addition to that each predator has different capabilities and those capabilities allow them to survive much better than the other predators, for example the hands were the fittest because they were equipped with the best tools for gathering food, whilst the clothes pegs were the least effective. 2. Predators are predators because they are physically more fit or advantaged than those on who they prey. The predator's phenotypes allow them to survive much better than the prey because they can overpower the prey. However the preys also have their own phenotypic capabilities which enable them to survive by feeding on other organisms, where they become predators momentarily. 3. The variety of predators creates very tough competition amongst the predators in similar regions, and thus the theory of survival of the fittest, the most efficient predator at 'hunting' has a better chance of survival. ...read more.

Middle

so with an increasing number of very efficient predators and a decreasing number of prey, some predators and eventually all prey will b extinct. 5. There were no environmental factors that could have affected the results, because all the predators were free to hunt wherever they wanted although there was unequal prey in some places the predators hunted, they were still free to go to another place. Except for the fact that the prey were easily visible in most places 6. It might have been harder to see some species of prey, such as the black beans and the pinto beans had they been placed against a black background whereas it would have been fairly easier to see the white beans. Thus the white beans might have become extinct mush sooner than the other two types of beans. 7. This activity is a good example of how two populations might interact because it contains very similar factors as those of reality, for example although the pinto beans were ...read more.

Conclusion

10. Experts might argue this because in some cases using pesticides and antibiotics will kill off one species of the family of bacteria or pest, in which case the only species left would be the ones which are immune to the pesticide or antibiotic. This would then later cause problems if the pest or bacteria has infected an organism. 11. The lack of genetic variation is dangerous to the survival of a population because if the population were to be infected with a virus or bacteria, that population would become extinct and then there would be no more of that organism, whereas if there was a variation in the population, one of the species might be immune to the virus in which case it would survive and thus would not cause a problem as that of Ireland. Christopher Chileshe May 2, 2007 Ms. Shaw IB Standard Level Biology 1 ...read more.

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