... to a marine lifestyle. The front limbs became modified as paddle-shaped flippers, the bones of which are still reminiscent of jointed limbs and digits, but the hind limbs were lost. The broad horizontal tail flukes that provide the main propulsive thrust bear no anatomical connection to the lost hind limbs, but are a seperate and distint development. They contain no bone, and owe their firm and yet flexible shape to underlying fibrous elastic tissue. The body is enveloped in a thick layer of blubber that aids in bouyancy, helps to preserve body heat, and is a source of stored energy. A cetacean’s skin is fr ...

... sons. The mothers have subtle eye changes which an ophthalmogist could identigy, but mothers usually have normal vision. For each son born to a mother who carries the gene, there is one in two chance of having X-linked ocular . The description is a hereditary deficiency pigmentation. This could involve the entire body or part of the body. This is believed to be caused by an enzyme deficiency involving the metabolism of melanin during prenatal development. This can be inherited by an dominant or recessive trait. In complete , there is lack of pigmentation in skin and hair, as well as in retinal and iris tissue; in ...

... sensory information. This enables us to recognize meaningful objects and events. Perception plays a big role in the performance of players. In soccer, there are other coaches and players, and parents who constantly try to take you out of your game. Although you know all this is going on, you are unable to see and hear anything because you are only concerned about the opposing team. If you do tune into a certain person this may be considered selective attention. Selective attention is the focusing on conscious awareness on a particular stimulus. (Reference) This means that at any moment we focus our awarene ...

... robot is essentially a long manipulator arm that holds tools such as welding guns or motorized screwdrivers or grippers for picking up objects. The robots working at Chrysler and in numerous other modern factories are extremely adept at performing highly specialized tasks - one robot may spray paint car parts while another does spots welds while another pours radioactive chemicals. Robots are ideal workers: they never get bored and they work around the clock. What's even more important, they're flexible. By altering its programming you can instruct a robot to take on different tasks. This is largely what se ...

... of people have the same genetic information, a disease could instantaneously wipe out the entire population. Our genetic make-up is what makes us unique. It gives us a sense of individuality and distinctiveness. If many people had the same DNA, how would we preserve our diversity and sense of self? Human cloning also raises many ethical and moral issues. Different religious groups regard cloning in different ways, but most agree on one point. Cloning puts the work of God into our own hands. The creation of life then becomes a manufacturing of duplicates instead of a "creative act of God". It is also important t ...

... its freezing point, the substance will remain at the same temperature until it has become completely solid, because heat is given off by the substance in its change from the liquid to the solid state. Hence, the freezing point or melting point of a pure substance may also be defined as the temperature at which freezing or melting continues once it has commenced. All solids melt when heated to their melting points, but most liquids can remain liquid even though cooled below their freezing points. A liquid may remain in this supercooled state for some time. This phenomenon is explained by molecular theory, which conc ...

... beliefs we may received from our parents as children. Perhaps it is because we live in a nation filled with many peoples of different beliefs whose Gods are all so varied and different that it is difficult to fathom that they are all the same divine being. It is also plausible that we just have a desire to quench the thirst for knowledge that lies deep within ourselves. As for myself, I cannot believe in a being which created a universe and a multitude of worlds in a rather short period of time then deigns to lower itself into becoming a puppet-master and "pulling the strings" of the Earth and all of th ...

... The Big Bang was the start of time and space. The matter and radiation of that early stage rapidly expanded and cooled. Several million years later, it condensed into galaxies. The universe has continued to expand, and the galaxies have continued moving away from each other ever since. Today the universe is still expanding, as astronomers have observed. The Steady State model says that the universe does not evolve or change in time. There was no beginning in the past, nor will there be change in the future. This model assumes the perfect cosmological principle. This principle says that the universe is t ...

... respiration take place on fingerlike infoldings 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 ...

... there is lots of unemployment. Building a nuclear power plant would create more jobs. This would also benefit the government because less people would be collecting unemployment insurance and welfare. Thus adding to the amount the government could be spending on other things such as fixing highways, better healthcare, and more funding to school. Nuclear power is also a lot environment wise. Nuclear power requires a mere fraction of the space that is required to set up a solar, wind, or hydroelectric generating station which. This will allow more space for private landowners and will also keep land prices at a lowe ...