... prenatal diagnostic tests, which, because the current tests are time consuming and technically difficult to do, are restricted to women over 35 and those who have a family history of chromosomal abnormalities. Prenatal tests using Willard's probes would be much simpler and faster to perform and could be available to all pregnant women who wish to take advantage of the technology. Current prenatal testing involves growing fetal cells in vitro and examining them, over one or two months, to see if there are two copies of a particular chromosome, which is normal, or one or three, which is abnormal. A test using Willard's probes would require only a few cells and ...
... One can make copies of copies with digital audio, and the hundredth will be exactly like the first. The great advantage of digital audio with respect to radio is the possibility of listener interactivity. Currently, any interactivity is limited by the inability of the individual talk to the other end of a radio transmission chain. When one switches stations on our radio, there is no interaction, we are simply selecting from a series of predefined options, just like changing channels on television. If you switch from one station to another, none of the stations know about it, and can do nothing to make their programming more interesting than their competition. The ...
... down to -45 degrees Celsius are not harmful and do not dampen their activities ( Mammals Multimedia Encyclopedia 1990). Tigers usually live and hunt alone. When they hunt they can leap 5 to 6 or jump as far as 10 meters. Tigers do not usually prey on people, but some do become man eaters. If a Tiger becomes a man eater it is because of a wound, weakness, or just because it is to old. The young accompany their mother on the hunt when they are 5 to 6 months of age. Tigers begin to hunt alone when they are just eleven months old. Before the young can hunt alone, the mother will demonstrate how it is done(Comptons Interactive Encyclopedia 1993). T ...
... It uses it’s arms as it’s front legs and walks on it’s knuckles. Our brain capacity is about twice as large as that of the chimp. Humans have a brain capacity of 1300 to 1500 cc, while the chimps are about 600 - 800 cc. It is though by scientists that our brain size grew over time as were evolved into making complex tools and we became increasingly sophisticated. The human skull is slightly different from that of our primate ancestors, these changes occurred over thousands of years of evolution. Over time the humans skull and teeth have decreased from that of our ancestors. The chimp has much larger canine teeth and a protruding jaw line. A similari ...
... sheep; using donor DNA and mammary cells from a female sheep cloned it. The process is very technical and I don’t fully understand it myself. From what I have researched I have come to understand that currently cloning is very “Hit or Miss”(Hawley). From 277 attempts, Dolly was the only successful attempt. The point is however that we now have a man created sheep, what else could be done in the near future. There are many different goals for . Would you like to clone someone close to you who had died? In the movie “Gattaca” you get a peak at something that could be made possible by cloning, the genetic engineering of children not yet born. It could ...
... product of sunlight, water and carbon dioxide combining in green plants. Most form part of plant cell walls. But unlike the other carbohydrates, fibres do not break down into sugars in the human digestive system and then course through the blood stream fueling muscles and nerves. Rather, when eaten they tumble intact through the stomach and small intestine and end up in the colon where billions of bacterial feed on them - in turn producing intestinal gas. No wonder, then, that dietary fibre has been unwelcome in many of history's nicer neighborhoods. Even 20th century doctors reasoned that since the bulky material provided not a single nutrient, it would ...
... Dioxide at 95.32%; Nitrogen at 2.7%; Argon at 1.6%; Oxygen at 0.13%; Water at 0.03%; and Neon at 0.00025 %. Martian air contains only about 1/1,000 as much water as our air, but even this small amount can condense out, forming clouds that rise high in the atmosphere or swirl around the slopes of towering volcanoes. Local patches of early morning fog can form in valleys. At the Viking Lander 2 site, a thin layer of water frost covered the ground each winter. There is evidence that in the past a denser Martian atmosphere may have allowed water to flow on the planet. Physical features closely resembling shorelines, gorges, riverbeds and islands suggest that great r ...
... until the 1950's. Around this time, increased levels of acidity were discovered in lakes in both Canada and Scandinavia. At first, this was looked at as an interesting situation, rather than a growing problem. Since that time, much research has gone into identifying the sources of acid rain and the damage that it causes. As research continued, the situation reached catastrophe proportions in the late 1970's. By this time, thousands of lakes in Canada and Scandinavia had been declared dead, devoid of life, while emissions of acid gasses continued to rise. Acid Rain Chemistry As mentioned earlier, the term acid rain is used to describe a variety of different typ ...
... effective way to transmit the disease, and rectal sex is a common practice among gay males. For these reasons, the disease spread in the gay male population of this country immensely more quickly than in other populations. It became to be thought of as a "gay disease". Because the disease is spread primarily by exposure of ones blood to infected blood or semen, I.V. drug addicts who shared needles were soon identified as an affected group. As the AIDS epidemic began to affect increasingly large fractions of those two populations (gay males and IV drug abusers), many of the rest of this society looked on smugly, for both populations tended to be despised ...
... and precisely from one flower to another of The same species, thus promoting out crossing. Many angiosperms display other modes of pollination, including self-pollination. Evolutionary Origins Plants derived from an aquatic ancestor, but the evolution of their conducting tissues, cuticle, stomata, and seeds has made them progressively less dependent on water. The oldest plant fossils date from the Silurian Period, some 430 million years ago. The common ancestor of plants was a green alga. The similarity of the members of these two groups can be demonstrated by their photosynthetic pigments (chlorophyll a and b,) carotenoids); chief storage product (sta ...
