Population And Natural Population

A population is a collection of organisms of the same species living in a particular area at a particular time. This is because all populations have some variation in genotype (genetic makeup). The phenotype, which is the appearance, of natural population varies as well. The likelihood of an adjustment in a population depends on the interaction between genes and the environment. Selection Pressures are factors that influence the survival of an individual, a population or a species. Some factors include, environmental factors, such as predators/prey, and competition among members of a species for similar limited resources.

Genes transmitting successful phenotypes from one individual to another and one generation to another. Selection pressures result in certain phenotypes of an organism being favoured over others ( i.e. The genes that control that organism are selected) and therefore variation results. As the gene pool of a population changes, its organisms change in appearance and the species evolve. All individuals are restricted by the alleles of the genes that they inherit. Although an individual of a species acquires a complete set of chromosomes and therefore inherits the same gene as all other members of that species, it will not necessarily have inherited the same combination of alleles of other individuals. (Purves, Orians & Heller, 1992)

The frequency of the alleles of a gene tends to be stable from one generation to the next if the environment does not change, if there is no migration and if no mutations take place.

Mutations may be either beneficial or harmful. If the environment changes, they might confer an adaptive advantage on the organism so that the mutation may become established in the gene pool. For a mutati...

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...ulations that have limited resources.

DISCUSSION

Referring to the results, It is found that there was a high water usage throughout the entire 4 weeks. In particular, the shower, used up most water usuage. This was the case because the shower was in use every single day, whereas the washing machine, and sink were not used as often. The amount of time spent in the shower also plays a role in the water wastage. There was also a high amount of pasta (incl pasta sauce) and meat that was consumed. Italian culture played a major role in the high amounts of pasta and meat consumed. Pasta was consumed 3-4 times a week, and meat was eaten 5-6 days in a week. There was a low level of vegetable consumption as they are not favoured in my part. Another major input was electricity. The monthly bills were often surprising, but the little things count.