.... 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 oocytes (incompletely developed eggs) and sperm are disposed of. The resulting embryos are observed for the next few days. - A small plastic tube is inserted through cervix to place .....

.... for this experience. I was disorientated, causing me to panic, which shortened the length of my dive, not to mention my air supply. Let's just say I would not do that again. To start exploring the underwater world, one must first master a few skills. Certification is the first step of learning to dive. From qualified professionals one must learn how to use the equipment, safety precautions, and the best places to dive. This paper is designed to help give a general understanding of the sport and the importance that physics plays in it. Self- contained Underwater Breathing Apparatus, or SCUBA for short, is a hell of a lot of fun. Howe .....

.... which results in global warming and melting of the ice caps. Up until the industrial era, the air was fairly clean. The use of smokestacks and the burning of fuels put many pollutants in the air during this period of time. The increased use of fossil fuels today also builds on this. There have been many attempts at stopping air pollution. The Clean Air Acts were effective for a little while. They made using some polluting substances illegal. This did not work because people simply did not listen. Solar Energy is another attempted solution. This type of energy is good because it is an alternative energy source to coal and other polluting fossi .....

.... America, and North America. As with most native forests, they have been cleared so that the land could be used for farming or residential use. The temperate deciduous forests of North America were more diverse than the same type of forests in Europe due to glacial history. Glacial action dumped till as the ice edge retreated, and North America inherited a fertile soil base. Soil type is an important factor for which species of trees can thrive in an area. The general dominant tree species for temperate deciduous forests are Beech, Ash, Oak, and in our region also Tulip, Maple, Birch, and Hickory. Developed forests consist of four layers. The layers .....

.... and parts of the digestive tract. All these different glands or organs work together in the production of certain hormones. Those produced in one location will almost always have an effect on many other areas of the body, not just the surrounding tissues. An analogy that fits very well with the study of the endocrine system is that of a message in a bottle. We can think of the body as a river, and a specific hormone may be a bottle containing a message. The organs or glands mentioned above would manufacture the “bottles” (hormones) that would be released into the river (blood stream). If there were no receptor sites for the hor .....

.... of Chemical Process The theory to how this fusion works is the Muon Theory. The muon theory is as follows: Speeding muons knock electrons out of their orbits around deuterium and tritium atoms. Muons replace the electrons and form a smaller atom. This "muo-atom" the n captures another nucleus. The muon orbits more tightly around the two captive nuclei leading them to overcome their natural repulsion of each other and fuse. This reaction produces a larger nucleus that almost immediately shatters, releasing energy. It also frees the muon, which can then repeat the cycle, causing several hundred more such fusions. The fact that .....

.... it’s geographic distribution is extremely wide and varied. The Aedes aegypti, with regard to both sexes, are generally similar in coloration (Womack 1993). The female adult is noticed by it’s small dark figure that is colored by white markings and banded legs. Its proboscis or snout is mostly black with regard to the white palp tips (Russel 1996). The dorsal pattern of white scales on the scutum is in the shape of a ‘lyre’ with two central based stripes that contrast with the dark scales present on the insect (Womack 1993, Russel 1996). Its wings are dark scaled and femur and hind legs are pale scaled for about three-quarters, .....

.... pellucida with a solution and take the two to eight cells and separate them into other petri dishes. Am artificially produced zona pellucida is added so embryonic development can continue. Now you have exact copies of the same genetic makeup in two to eight separate petri dishes. Even though this process sounds simple enough it has never fully worked because of abnormalities that occur like if the embryo is developed by two sperm cells the chromosome count is wrong. Another is as the cells duplicate they usually do not make it passed the 32-cell stage or 64 because of abnormalities in the environment or just because the process is not natural. The re .....

.... the size of our planet. With the comet going so fast, these materials are forced behind the comet, forming a long tail of dust and gas. Comets are cold bodies. We see them only because the gases they are composed of glow in the sunlight. All comets are regular family members of the solar system family. They are bound by gravity to a strict path around the solar system. Scientists believe that all comets were formed of material, originally in the outer part of the solar system, which did not become incorporated into planets. This material is from when the planets just started forming. This makes comets an extremely interesting topic to scien .....

.... of KClO4 in a test tube. Record the accurate weight below. Product Weight Before Weight After Mass of Test tube + KClO4 41.5g 39.8g Mass of Test tube 37.5g 37.5 Mass of KClO4 4.0g 2.3g 2. Set up the apparatus shown below. 3. Gently heat the test tube containing the potassium perchlorate. Gas should begin to collect in the collection bottle. Record all observation. 4. Once the reaction is complete, no more gas give off, allow the test tube to cool. While the test tube is cooling test the gas in the collection bottle with glowing splint. Caution: Do not leave the rubber tubing down in the water trough during cooling or you will experience bac .....