.... to assess the possibility of a vaccine. The disease has a long and complex life cycle which creates problems for immunologists. The vector for Malaria is the Anophels Mosquito in which the life cycle of Malaria both begins and ends. The parasitic protozoan enters the bloodstream via the bite of an infected female mosquito. During her feeding she transmits a small amount of anticoagulant and haploid sporozoites along with saliva. The sporozoites head directly for the hepatic cells of the liver where they multiply by asexual fission to produce merozoites. These merozoites can now travel one of two paths. They can go to infect more hepatic liver cells or they can attach to an ....

.... bodies, and the Grand Coulee Dam. White wants his readers to think about nature and its relationship with humanity. White explains how the river is energy. The Columbia River works as gravity pulls it to the Pacific Ocean. The Columbia is continuously cutting into the terrain that it flows through. Over millions of years water rushed through the Columbia Basin to form the Columbia River. Water carries soil, silt, and debris downstream. The constant movement of material in the river cuts and shapes the river basin into the land. This movement is a slow and inefficient use of energy. According to White, only two percent of water's potential energy results in t ....

.... Out of those 221, 128 have no obvious cause of death. Marine biologists have been unable to find the cause of these deaths. They suspect that the Red Tide off of the coast of southwest Florida has some connection with these mysterious deaths. A red tide is a bloom of flagellates which are deadly to marine life, but cause no harm to the human population. Another possible cause is a virus that is unknown to scientists. Many people believe that this problem will eventually stop an the manatee population will flourish, but others are rather pessimistic. Ecological Problem: The manatee population is quickly dying off and unless they make an astonishing comeback, they ....

.... interested in geology and natural history and was not intrigued by his studies of the holy ordge University. He was sent on a trip to explore the world and while he was on this journey, he became enthralled with biology and geology. He made and wrote observations about coral reefs (1842), and volcanic islands (1844), but his greatest biological observations were those pertaining to his theory of evolution. Darwin's findings begin in the Galapagos Islands where he noticed a wide array of finches whose beaks were different sizes. He believed that the physical conditions on the island did not affect the birds' beaks, but it was the birds' feeding habits. For instance, ....

.... interact with the other phase to differing degrees due to differences in adsorption, ionic strength, polarity or size. These differences allow the mixture components to be separated from each other by using these differences to determine the transit time of the solutes through a column. Simple liquid consists of a column with a fritted bottom that holds a stationary phase in equilibrium with a solvent. Typical stationary phases (and their interactions with solutes) are: solids (adsorption), ionic groups on a resin (ion-exchange), liquids on an inert solid support (partitioning), and porous inert particles (size exclusion). The mixture to be separated is loaded onto the t ....

.... for two asic reasons. One is the fact that autotrophic organisms create most of the oxygen that heterotrophs breath. Whithout them, heterotrophs which need oxygen to survive would not live very long. The second reason is that autotrophs are the lowest food on the food chart. Without them many heterotrops would die from starvation. 3. Why did you put your syringes containing leaf material in the dark prior to illumination? The reason this was done was to make sure as little oxygen as possible was contained in the leaf material. This coused the experimrnt to run properly. If the leaf material was not placed in the dark, the dark reaction would not have occured using up all ....

.... help preserve nature's delicate balance by keeping herds of deer, elk, moose, and other large mammals in check, as well as keeping these populations strong and genetically viable by preying on the weak and sick. Both the idealized wolf and the demonic wolf are creations of the human mind. It is not easy to transcend the image of the Big Bad Wolf that has filled our myths and legends, but if we know only this wolf we do not truly know the wolf at all. And what we do not know, we fear. Our fear is perhaps the greatest threat to the survival of the wolf, for it causes us to react rather than act, to repel rather than respect. But this fear and hatred did not always separa ....

.... series of units called nucleotides. Each DNA nucleotide is composed of three subunits: a special sugar called deoxyribose, a phosphate group that is joined to one end of the sugar molecule, and one of several different nitrogenous bases linked to the opposite end of the deoxyribose. DNA has two specific functions: to provide foe protein synthesis, and hence the growth and development of the organism and to furnish all descendants with protein-synthesis and hence the growth and development of the organism. So all living things on plant Earth contains the genetic material DNA and the structure of a DNA molecule or combination of DNA molecules determines the shape, form, a ....