Biology Essays and Term Papers

constant from generation to generation, the population is said to be in Hardy-Weinberg equilibrium where there is no evolution. Such conditions are when there is a very large population size, no migration, no net mutations, random mating, and no natural…

similar and can breed together to produce young animals or plants of the same kind as them. Speciation, the origin of new species, is the key process that brings new types. The four factors that contribute to the creation of new species within a populati…

some species change over time, that other species diverge and become one or more new species, and that still other species become extinct. Darwin's theory was that evolution progresses through natural selection. The synthetic theory of evolution combines…

care professionals in clinical settings, but it is relatively new to the household environment. Advertisements and marketing schemes make antibacterial products seem more effective and appealing to the public. Most people now believe that using antibac…

the way that the heart normally functions. Heart diseases have many causes, some of these include smoking, high blood pressure, high cholesterol and physical inactivity. Although there have been dramatic improvements in the treatment and prevention of…

in the construction of the nervous system. Evolution, development and learning all affect the organisation of nervous systems and all are inextricably linked together. The importance of evolution can be observed easily simply by looking at…

to animals that have evolved to live at the surface which need to be overcome if the animal is to utilise the marine setting as a habitat and foraging environment. These problems are associated with the inability of the terrestrial respiratory surface…

has long been of interest to systematicists such that the evolutionary history of life can be studied. However, due to the timescales involved, direct observation of this phenomenon is not possible and as such, evolutionary history must be inferred…

contain some truth, but dogs are not the only animal friend whose companionship people enjoy. For many people, a cat is their best friend. Despite what dog lovers may believe, cats make excellent housepets. In the first place, people enjoy the compani…

of whether the Ziploc bag will allow the iodine or starch to diffuse across the plastic "membrane". The hypothesis being tested is if the bag will allow the iodine to travel across the membrane and if it will react with the starch in the Ziploc bag. …