.... it possible for life on Earth. Ozone is made naturally by photochemical and discharge reactions. Photochemical production occurs when, " high energy radiation from the sun strikes ordinary oxygen molecules in the upper atmosphere." Lightening and sparks from motors also convert oxygen to ozone ( Stoker 1). The question about the destruction of the ozone layer revolves around whether human-made CFCs (chloroflurocarbons) used in air- conditioners and refrigerators are breaking it down. This is the ozone thinning theory: "CFCs release chlorine into the stratosphere... leading to ozone destruction and exposing the planet to harmful ultraviolet rays." Critics who discount t ....

.... crucial functions in the ecosystem, have increased throughout the Bay. The oyster and blue crab catch, however, continues to dwindle, and some find fish populations have declined. Species, such as striped bass have increased to the point that they are commercially viable again. The Chesapeake Bay's decline was evident as early as the 1950s. In the late 1970s, state and federal scientists began an extensive study to determine the reasons for the Bay's decline. Three major problems were identified; excess nutrients from wastewater, agricultural lands, and developed land; sediment in runoff from farms, construction sites, and eroding lands; and possible elevated levels of toxi ....

.... they have similar hunting habits and similar equipment for catching and killing - sharp, hooked beaks, and strong, sharp, curved toenails or talons. Owls are nocturnal for the most part and the others hunt during the day. Hawks evolved from raptors which also were birds of prey. Hawks evolved with eagles and falcons mainly but also with some other birds as well. Habitat and Biome Hawks live in all different habitats. Some in the foothills of the mountains while others live in the brushy open country and badlands of Oklahoma, Arizona, New Mexico, Nevada, and South-central California. Also in North and Central America for a more wide variety of hawks. Its biome would b ....

.... examine if computers actually do mimic the human mind then we must first look at the capabilities of the human mind. If one looks closely at the capabilities of the human mind and compares them to the most recent technological advances, then it would be obvious that computers and software are beginning to mimic even the most advanced mental states. In the future, computers will be able to do anything the human mind is capable of thus proving Eliminative Materialism to be a sound solution to the mind-body problem. Most of the day the human mind is taking in information, analyzing it, storing it accordingly, and recalling past knowledge to solve problems logically. This is s ....

.... of Hawaii; in Haleakala National Park on Maui; and at the Kilauea National Wildlife Refuge, along the Na Pali coast and outside Lihue on Kauai. Captive Nene can be seen at he Honolulu Zoo. Designated Hawaii's State Bird on May 7, 1957, the Nene has endured a long struggle against extinction. During the 1940s this species was almost wiped out by laws which allowed the birds to be hunted during their winter breeding seasons when the birds were most vulnerable. By 1957, when the Nene was named the State Bird, rescue efforts were underway. Conservationists began breeding the birds in captivity in hopes of preserving a remnant of the declining population and, someday, success ....

.... of the cell membrane. Ribosomes are scattered throughout the cytoplasm, and the DNA is generally found in the center of the cell. Many bacilli and spirilla have flagella, which are used for locomotion in water. A few types of bacteria that lack flagella move by gliding on a surface. However, the mechanism of this gliding motion is unknown. Most bacteria are aerobic, they require free oxygen to carry on cellular respiration. Some bacteria, called facultatibe anaerobes can live in either the presence or absence of free oxygen. They obtain energy either by aerobic respiration when oxygen is present or by fermentation when oxygen is absent. Still other bacteria cannot live ....

.... Mendeleyev who a renowned teacher developed, the periodic law of the properties of the chemical elements (which states that elements show a regular pattern when they are arranged according to their atomic masses). Mendeleyev wrote a two-volume book called Principles of chemistry (1868-1870), which later became a classic. These books included an improved version of the periodic table. Sir Joseph Thomson, another important person in the development of the atomic theory, was born in 1906. Thomson won the Nobel Prize in physics (1906) for his work in the conduction of electricty through gases. He discovered the electron by using cathode rays. An electron is the smalles ....

.... These majestic beasts can float across the water amazingly fast for its size ("Florida Manatee" 1). They can weigh up to a ton, and get as long as fifteen feet. They are almost devoid of hair, except for some whiskers on their face, and they have internal ears on the sides of their head. Their nostrils are closed by valves, so they can accomplish such feats as flips and quick turns without losing any air. Manatees have no hind legs, but instead one big, flat, spatula-like tail (Sentman 327). This feature made people confuse manatees with mermaids for nearly four centuries (O'Shea 66). Many biologists say that manatees possibly originated or evolved from ungulates such as ....