... are completed the annulus dries out releasing the spores. The spore germinates and grows into a prothallus which is the gametophyte generation. The antheridia and the archegonia are developed on the bottom of the prothallus. The archegonia are at the notch of the prothallus and the antheridia are located near the tip. Fertilization occurs when outside moisture is present and the sperm from the antheridia swim to the eggs of the archegonia. A zygote is formed on the prothallus and a new sporophyte grows. 4. Flowering plants have unique characteristics that help them survive. One is the flower itself that contains the reproductive structures. The color of th ...
... The U.S. produces over a billion pounds of phosgene (CG) per year for industrial uses; however, we do not stockpile this agent for military use. Perfluoroisobutylene (PFIB) is a toxic pyrolysis product of tetrafluoroethylene polymers encountered in military materiel (e.g., Teflon7, found in the interior of many military vehicles). The oxides of nitrogen (NOxs) are components of blast weapons or may be toxic decomposition products. Smokes, e.g., HC, contain toxic compounds that cause the same effects as phosgene does. The remainder of this chapter will deal solely with phosgene because it is the prototype of this class of agents; however, the principles of medical ...
... of a cell are directly influential in the efficiency of the cell’s nutrient absorption and waste expulsion processes. Since the cell membrane of an eukaryotic cell is its only source of nutrition, its surface area must be large enough to allow the cell’s organelles to receive the material it needs or it will die. The eukaryotic cell does this by maximizing the surface area to volume ratio. By using the surface area and volume equations for a sphere you can estimate the surface area of a small cell. By modeling the growth rate of the surface area and volume of a sphere on a linear graph its easily discernible that as the size of the sphere increases the ratio of ...
... so the charge is lost. So you need to make sure that there is no bare metal, chips or cracks on the vehicle, which is impractical. Another problem is that it is almost impossible to hold a charge (potential difference) on a sharp thin edge of metal, and so this technology is not really suited for vehicles, which are made up of many irregular shapes. Because of this, it is also ineffective on existing rust and the areas surrounding it, as rust always causes sharp edges and damaged paintwork. Electronic rust prevention is another method used to prevent rust using one of two technologies; either Impressed Current or Sacrificial Anode. Impressed Current units are ext ...
... disappear from the pressures of being killed. While the animal is trying to change habitats they have died. The rain forests that the jaguars inhabit are being torn down to open up lumbering, farming, livestock raising, and other activities carried out by humans. Killing a jaguar is taking away a life that is doing no harm to the eco-system. A jaguars' way of living is much like that of a human, you don't see jaguars killing humans for their skin. III. Any endangered specie, including the jaguar, has many different alternatives in which the government or a national group would have to be involved. There are several organizations that help the breeding and ...
... estimate that each year 50 out of every 100,000 Americans have symptoms. Among college students, the rate is several times higher. does not occur in any particular "season," although authorities in colleges and schools, where the disease has been well studied, report that they see most patients in the fall and early spring. Epidemics do not occur, but doctors have reported clustering of cases. Transmission: EBV, the virus that causes most cases of , infects and reproduces in the salivary glands. It also infects white blood cells called B cells. Direct contact with virus-infected saliva, such as through kissing, can transmit the virus and result in . Someone ...
... Talent and pay C. Average salary D. Area and pay IX. Pros A. Advancement B. Money C. Cutting edge of techology D. Change X. Cons A. Working conditions and hours B. Pressure and deadlines C. Adapting Conclusion-Computers are changing the world as we know it, and they offer an exciting new way of working. The news represented a complete turnaround for the corporate giant. Microsoft Chairperson, Bill Gates publicly announced his company's new connection to the Internet. The announcement rang through the nation. Gates has consistently ignored the Internet in favor of desktop computing. So, with Microsoft's approval, computers ...
... seek a greater understanding of the world, to know "why" we are not just "what" we are. The Greeks invented science and explored it in its truest form, philosophy. Through the years we have developed tools that we hope can prove or disprove various hypothesizes, to further our understanding of any number of things. We divide science into categories and then sub-divide it even farther, until we can hide the connections and pretend that they really are separate. The difference between psychology and physics is not as extreme as one would believe if they were to read their definitions. Though the means are different the goal is the same for all science: to increase ou ...
... three feet, and instead of standing straight, forms a crecent arc on her back towards the tail. Although Killer Whales are not used for oil-based products they have over and over again been found with harpoons sticking out of their backs. Research soon found that fishermen were shooting them to keep them from eating all of a days catch. This was not the first time something like this was found. In the 1950's The U.S. Navy used machine guns to slaughter hundreds of Killer Whales off of Iceland to protect fishing. After these animals are killed, they are usually thrown away. The meat is very bitter and is not used. Killer Whales also do not produce oil as most othe ...
... Information System, cavity trees, cavity restrictors The red-cockaded woodpecker (Picoides borealis) is an endangered species that inhabits pine forests in an historical range from Texas to the Atlantic coast (Jackson, 1986; Reed et al., 1988). Picoides borealis nest in clans or family groups that usually consist of one breeding pair and 2 non-breeding male helpers (Jackson, 1986 ). This group establishes and defends a territory that includes foraging habitat and nesting "cavity trees" (Copeyon et al., 1991; Jackson et al., 1986; Rossell and Gorsira, 1996). Red-cockaded woodpecker clans excavate cavities in living pines, and have established a livin ...
