Biology Comparison Questions And Answers

Fitness is determined by the ability of an organism to survive, grow, and reproduce in a particular habitat. You

Prelab Questions Analyze prokaryotic and eukaryotic cells. 1.Similarities : They both have DNA as their hereditary material. They are both layer bound. They both have ribosomes. They have comparative fundamental digestion system.

To start off with, eukaryotic and prokaryotic are types of cells. Though that is an obvious similarity, they are both the smallest structure that carry out functions in organisms. In each of these

Both directional and disruptive selection is a type of natural selection. Natural selection is the differential survival and/or reproduction of organisms as a function of their physical attributes. (phenotype) This results in evolution over many generations. Each mode of selection alters the mean or variance of a phenotypic trait in a population or species. These distributions can be represented in bell curves. Both selection processes can be influenced by human interaction.

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.

You can identify a eukaryotic cell by its encased nucleus, containing the majority of its DNA and organelles surrounded by a membrane. Plant and Animal cells have double membranes and a housed nucleus therefore they are eukaryotic cells; organisms which do not contain a double membrane and an encased nucleus are known as prokaryotes, e.g. bacteria. The eukaryotic cell is made up of many membrane bound organelles which all have a specific function.

Selection is the functional relationship between phenotypes and fitness. Natural selection is the production of organisms according to their physical attributes whereby off springs of the younger generations takes the strong, desired and inheritable aspects of their parents. They become more adapted to the environment although some does well than others according to their individual traits which are attributed to their phenotypes (Sinervo, 1997). According to Charles Darwin, fitness can be described in three different forms of selection which interferes with the mean of phenotypic traits in a population. They include: directional selection; stabilizing selection; and destructive selection.

Natural Selection- Natural selection is the way organisms adapt over time so that they have the best chance of survival in their environment. Natural selections selects against unfavorable traits, so that the ones that will be of the most evolutionary help will be more common. There are three different way that natural selection occurs; directional selection, stabilizing selection, and disruptive selection. Directional selection is "a favored trait is at the extreme expression of traits," (Kobari). Stabilizing selection is the "selection against extreme expression of traits" (Kobari). Disruptive selection is when

A lot of lessons were learned in trying to work with one set of people within the black community, with specific reference to black youth voters. The belief among this set of people that one vote does not make a difference is so deeply entrenched in their minds; coupled with continued inequality among the black society to a point that it becomes very difficult to convince them otherwise. Also, majority of African Americans are perceived to be less trusting, more alienated, less well informed about politics; due to less formal education as compared to the whites. Hence, they soon give up with the thinking that no matter how mush efforts they make to bring change through voting, society is still going to remain as it is.

Genomic structures of both the organizations are similar to certain extent. Bauman (2004) suggested that Prokaryotes keep the main portion of their DNA with other closely-associating molecules such as Proteins and RNA as a chromosome or two, whilst a eukaryotic cell contains more than one chromosome in their genomes. Eukaryotic chromosomes differ from its typical prokaryotic counterparts by having linear DNA rather than circular DNA (Russell.P 1996).And also eukaryotic chromosomes are composed of DNA and globular proteins called ‘Histones’. The eukaryotic genome structure could be illustrated in the following way; DNA is filled into

evolution of the species, what adaptive property it provides that would cause it to be selected

Drugs have become a rising problem for nations across the globe. In Canada, drug use among individuals aged 15 years or older was 11%, demonstrating that an issue does indeed exist (Health Canada). "Many of society's worst problems with drugs result from the fact that they are illegal. Like alcohol and tobacco, drugs should be legal in this country." Although this has been a much debated dilemma, I would agree with this statement because of the practicality that it would entail. Drugs are the source of many societal and class issues that could be resolved by the implementing a structured legal system that will facilitate the regulation of drugs. Making drugs legal will resolve more problems than what it will cause.

All species of fungi, plants and animals are formed from eukaryotic cells. The Eukaryote have a true nucleus; their DNA is confined to a definite area within the cell enclosed by a Nuclear envelope. Prokaryotes evolved before eukaryotic cells and their cells do not have a true nucleus. Prokaryote DNA is not enclosed by a membrane.

Evolution depends on both inheritance and selection (Arnold, 1994). Heritable traits having some advantage to an organism must be passed on from one generation to the next. As a result, the organisms that have inherited these traits will be better suited for survival in a specific environment. In other words, the ability for an individual to survive is not enough to fuel evolutionary progression- there must be reproduction taking place as well (Figure 1).

Since the year 1954 people have been faced with the conundrum of nuclear energy. This process though unfamiliar with some, is when decaying uranium heats water that then turns a turbine which produces energy. In the coming years nuclear energy is going to play a major part in the worlds energy consumption if we are to meet carbon goals. Though nuclear energy has been around for over fifty years the battle still wages on over its use throughout the world.