Biology

H.pylori is a spiral shaped gram-negative bacterium found in the mucus lining of the stomach and duodenum. It is motile due to the presence of a sheathed flagella which, together with its spiral morphology, aids in the colonization of the gastric and duodenal mucus (Eaton, Morgan, Krakowka, 1992). It has a cell wall containing lipopolysaccharides (LPSs) which is typical of other gram-negative bacteria. Aside from maintaining physical integrity and function of the cell envelope, the LPSs also afford...

Oral cancer, found in the oral cavity, can be detected early on. Cancers of the oral cavity are growths that appear on the lips, tongue, gingivae, palate, buccal mucosavestibule, salivary glands, and the floor of the mouth. Majority of these cancers are carcinomas, or tumors that cultivate from unrestrained growth of single cells or clones of cells that are found in the stratified squamous epithelium (Silverman 2001). Most of these cancers are of the squamous cell type, particularly squamous cell...

Cystic fibrosis, also known in medical terms as mucoviscidosis is a genetically acquired (hereditary) disease common people of Caucasian and Jewish descent (Roberts, 2003). It affects glands that aid inn waste secretion in the entire body to bring about steady progressive disability and eventual death (Davis, 1993). Children who acquire cystic fibrosis are at a risk of facing an early death. The body organs that are most often affected are the lungs, liver, sinuses and the pancreas.  The sex...

There are animals that undergo a specific phase of transformation called metamorphosis. Animals like butterflies, frogs, newts and mosquitoes all experience metamorphosis before they reach the imago phase of their life. Metamorphosis is associated with the different stages in life before coming out in adult form. One of the significant associations of metamorphosis is the adaptive changes incur in the organism in the way the organism interacts with its environment. The environmental cues play an...

Oxygen is a basic requirement for the survival of mankind. This is because it aids in the bodys respiration process. On the other side, although plants respire just like we do, they do so only for few hours in a day. Plants make their own through a process called photosynthesis. This process requires water, nutrients from the soil, sunlight and carbon dioxide. This paper is written to support the fact that there could be no people without plants. According to scientific evidence, plants mostly...

Though considered to be microscopic, cells reproduce themselves in an elaborate cycle called the cell cycle (Morgan, 2007, p.1). Some processes involved in the cell division cycle are mitosis and meiosis which are often confused with each other.     Mitosis or nuclear division is the complex process by which the eukaryotic cell divides the chromosomes in its nucleus equally into two identical daughter nuclei (Morgan, 2007, p.4). Mitosis is also one of the major processes involved...

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