... first develops in the muscles of body parts distant from the brain, such as the hands, and subsequently spreads through other muscle groups closer to the brain. Such early symptoms as this, however, can hardly be noticed. Early symptoms of are very slight and often overlooked. They begin as simple things, such as tripping or dropping things. Twitching or cramping of muscles and abnormal fatigue of the arms and legs may soon follow, causing difficulty in daily activities, such as walking or dressing. In more advanced stages, however, shortness of breath or difficulty in breathing and swallowing ensue, until ...

... is that for spoiled? The giant anteater has a tube-shaped head and a long, slender snout. Giant anteaters certainly live up to their name; some grow to be over six feet in length, with a tail of about three feet (Encarta ‘98)! Anteaters' tongues are two feet long, and the animals can move them in and out of their mouths up to 150 times per minute (Schupska 1). The giant anteaters lives on the ground. It walks with its front feet turned on the sides to protect its claws, which the animal uses to rip open ant nest before eating. Then it flits its long tongue and literally licks up the ants. The anteater ...

... total), while power generating plants and industrial commercial and residential fuel combustion together contribute most of the rest. In the air, the sulphur dioxide and nitrogen oxides can be transformed into sulphuric acid and nitric acid, and air current can send them thousands of kilometres from the source.When the acids fall to the earth in any form it will have large impact on the growth or the preservation of certain wildlife. NO DEFENCE Areas in Ontario mainly southern regions that are near the Great Lakes, such substances as limestone or other known antacids can neutralize acids en ...

... The increase of the population of a species is caused by the predator when it stops feeding on a species lower than the predator in the food chain. So when the predator stops or reduces the amount of feeding on a species, the population of the species would start to increase. 3. It is seldom possible to count all the individuals in a given space. Explain one method by which biologists can study population densities without obtaining such data. Scientist barely ever count the amount of individuals in a certain area because it would take too much time. Instead of actually counting the number of individuals in an ...

... Hormone) to stimulate development of the ovarian follicles which contain eggs. Frequent blood tests are taken to monitor hormone secretion from the ovary and pituitary gland. - When eggs are ripe, they are retrieved by transvaginal needle aspiration, guided by ultrasound. At the same time, semen samples from the husband (or donor) are obtained. The most active and healthy sperm are selected by forcing them to swim through a culture medium. - The egg and sperm are placed together in a suitable medium for fertilisation to occur in a culture dish. If fertilisation does not occur after 72 hours, the o ...

... an ancient Greek physician, who called the disease melancholia. He viewed it as an abnormal behavior which was caused by other diseases. Hippocrates recommended rest, exercise and a change in ones diet as treatment to this illness. Later, in the middle ages, this abnormal behavior was considered to be a result of demonic possession. It was treated with exorcism, flogging and torture to drive the evil spirits from the body. It wasn't until the late 19th and early 20th centuries that physicians had a more scientific view on depression. Sigmund Freud and Josef Breuer discovered that depression is a p ...

... being bombarded with cosmic rays from outer space, and powerful lightning bolts arced through the skies, lighting up the desolate landscape.  Given enough time, cosmic rays, and lightning bolts, a "primordial soup" gradually formed which contained amino acids.  These in turn got hooked together to form simple proteins, the "building blocks" of life.  At some point these proteins happened to get connected in just the right way, and a threshold was crossed:  the proteins started reproducing themselves, and simple life was "born". During uncounted eons, this simple life gradually became more and more complex ...

... development. In some children, future problems can often be seen at birth. In most cases, the problems become more noticeable as the child falls further behind other children the same age. Between 18 and 36 months old, they suddenly reject people, act strangely, and lose language and social skills they had already learned. During the 1950’s and 1960’s, people with were isolated and some were sent away to institutions. Today, many of those with can attend school with other children. Methods are available to help improve their social, language, and academic skills. Even though more than 60 percent of adults ...

... early stages of development within the body cavity of the mother. Some mammals are helpless at birth, others are able to walk and even run immediately, and may be born fully furred and with their eyes and earsopen. The largest mammal, the blue whale, Often exceeds 30 m (100 ft) in length, and the smallest shrews, mice, and bats are often less than 5 cm (less than 2 in) in length. In many mammals the color of the skin or fur blends with the animal’s natural surroundings. In others there is great contrast with the natural surroundings to favorvisual signals that provide information about theidentity of a s ...

... from burning these fossil fuels rise into the atmosphere and combine with moisture in the air to form acid rain. The main chemicals in air pollution that create acid rain are sulfur dioxide and nitrogen oxides. Acid rain usually forms high in the clouds where sulfur dioxide and nitrogen oxides react with water, oxygen, and oxidants. This forms a mild solution of sulfuric acid and nitric acid. These chemical reactions that change air pollution into acid rain can take from several hours to several days. Sunlight increases the rate of these reactions. Rainwater, snow, fog, and other forms of precipitation contai ...