.... have an understanding of basic optical principles. To gain insight into why the eyes of animals have evolved the way that they have, we must also understand the environment in which animals have needed to adapt to. The theory of lens design has two basic models. The convex lens, or plus lens, is known as a converging lens. When light passes through this lens, it is bent toward the optical axis, which is the direction in which the light was traveling, and is generally perpendicular to the optical element. Depending on the power of the lens, the light that passes through it will .....

.... afford to throw lives away because some think they1re meaningless. If we continue to accept the merciless killings and suicides of the helpless but powerful, the light will soon burn out. There will be no energy in the world. Euthanasia and doctor-assisted suicide should not be accepted or allowed by the government and people of the United States. Statistics show that seventy-three percent of the U.S. population approved of some form of euthanasia. This is used constantly in debates to pass laws for making euthanasia legal. But the people are deceived by this number. When the poll .....

.... also refered to as a rubber, safe or jimmy. It catches semen before, during and after a man ejaculates.It prevents pregnancy by preventing the sperm from entering the vagina. There is however a risk that you might get pregnant even with the use of condoms. It is not one hundred percent effective. However, latex condoms also protect against sexually transmitted diseases (STDs), including HIV. The latex condom offers better protection againsts STDs than any other birth control method. It blocks exchange of bodily fluids that may be infected. The Pill is one of the most effective reversible met .....

.... care professionals about the disorder and encourage people with it to obtain effective treatments. To continue , in a panic disorder, brief episodes of intense fear are accompanied by multiple physical symptoms (such as heart palpitations and dizziness) that occur repeatedly and unexpectedly in the absence of any external threat. These “panic attacks,” which are the hallmark of panic disorder, are believed to occur when the brain's normal mechanism for reacting to a threat—the so-called “fight or flight” response—becomes inappropriately aroused. Most people with panic diso .....

.... which are 10nm apart from each other visible on the surface of the virus. The average length and diameter of the virus is 920nm and 80nm. The virons are highly variable in length (polymorphic), some attaining lengths as long as 14000nm. The Ebola virus consists of a helical nucleocapsid, which is a protein coat and the nucleic acid it encloses, and a host cell membrane, which is a lipoprotein unit that surrounds the virus and derived form the host cell's membrane. The virus is composed of 7 polypeptides, a nucleoprotein, a glycoprotein, a polymerase and 4 other undesignated proteins .....

.... understand that what he did was bad, and he is getting punished for it. The child might then not do anything similar from then on, because he knows that it is socially unacceptable. The child might also continue to do bad things, because he doesn't realize that what he did was wrong. Another way evil may be introduced into a person can also be from a movie or the media. The first time a person sees a movie with violence and killing, the person might copy what he sees in the movie, and choose to murder. Aristotle says "Every act and every inquiry and similarly every action and pursuit .....

.... in conspicuous places (Horton and Smart, 1984, p. 320). Individuals with benign forgetfulness also are acutely aware of their memory deficit, while those with dementia - except for in the early stages of the disease - have no insight into their memory deficit and often blame others for their problems. In addition to the memory deficit interfering with the patient's daily activities, patients with dementia have evidence of impaired abstract thinking, impaired judgement, or other disturbances of higher cortical functions such as aphasia (the inability to use of comprehend language), apraxia .....

.... chancre is very infectious. It will heal with or without treatment, but the bacteria will remain and begin to spread if untreated. In the secondary stage, occurring about six weeks later, a generalized rash appears. It can last for weeks or months, perhaps up to a year. Painless ulcers develop in the mouth. Most people discover raised areas around the genitals or anus. The bacteria can be easily spread through mucous patches on the raised areas, which are called condylomalata. Flu-like symptoms start to occur, and can come and go for years. These symptoms may include a rash (over entire b .....

.... type of virus that reproduces differently from other viruses—from the lymph node of a man at risk for AIDS. Nearly simultaneously, scientists working in the laboratory of American research scientist Robert Gallo at the National Cancer Institute in Bethesda, Maryland, and a group headed by American virologist Jay Levy at the University of California at San Francisco isolated a retrovirus from people with AIDS and individuals having contact with people with AIDS. All three groups of scientists isolated what is now known as human immunodeficiency virus (HIV), the virus that causes AIDS. Inf .....

.... external and or internal to the being), and in particular the capacity to feel pain. 2) reasoning (the developed capacity to solve new and relatively complex problems) 3) self-motivated activity (activity which is relatively independent of either genetic or direct external control) 4) the capacity to communicate, by whatever means, messages of an indefinite variety of possible contents, but on indefinltely many possible topics. 5) the presence of self-concepts, and self-awareness, either individual or social, or both. (Taking Sides -Volume 3). Several cases have been fought for the rig .....