... , riceland, marshland, or pastoral solitudes where few cared to go, until the big city spilled hither, replacing the uprooted reeds with split-levels, pushing noisy little streets into the heart of the solitude, and collecting here from all over the country the uprooted souls that now moan or giggle where once the carabao wallowed and the frogs croaked day and night. In very new suburbs, one feels human sorrow ... to be a grass intrusion on the labors of nature. Even barely two ... years ago, the talahib still rose man-high on ... ...

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• Grade Level: High School

... cell is removed and placed in the somatic cell. This is impossible in humans right now because the somatic cells are specialized and there are many genes that have been switched off in them that we do not know how to turn them back on. This was done with frogs however. The eggs were implanted with the nuclei from the intestinal lining of tadpoles. Most of ... these frogs died or grew into monsters. Of the ones that did grow ... normally they were sterile. In the field of medicine, cloning can be a very useful technique. It is not only just being ... ...

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• Grade Level: High School

... adult differentiated cells cannot be used to clone an organism."" (http://library.thinkquest.org/C0122429/history/1952.htm). In 1962, John Gurdon claimed to have cloned frogs from adult cells. His experiment demonstrated that cells retain the ability to form different tissues even after they specialize. Yet, mistakes were found in his work. "Dennis Smith pointed out that there were some undifferentiated ... sex cells in the intestines of South African frogs, so the tadpoles Gurdon cloned may very well be cloned from those undifferentiated cells."" (http://library.thinkquest.org/C0122429...

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• Grade Level: High School

... topic. Cloning plants was a lot easier than cloning animals. Plant breeders have been taking advantage of the ability of cloning for a long time. The clone will need to have exactly the same genes as the original. The farmer that grows these plants from seed never knows exactly how it's going to turn out. Cloning ... plants grown in test tubes bloom sooner than plants grown from seed. Every year 8 billion trees are cut down for human needs. Cloning might solve the problem of cutting down to many trees. In 1998 an Australian company ForBio announced a new technology for cloning and growing...

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... there are eight million human clones living on earth. Identical twins have the same genetic information due to the embryo splitting during early development producing two organisms, therefore making them clones. Cloning has a short but rather amazing history. People actually attempted cloning at the beginning of the 20th century. Sea urchins, frogs, sheep and other organisms were used to try to perfect cloning. Cloning ... has been attempted many times. The first attempt was made by Adolf Eduard Driesch. Driesch could let the eggs of a sea urchin into a two-blastomere stage. Then he sepa...

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• Grade Level: High School

... . This is because tomatoes must be picked before they are ripe to prevent them from rotting during shipping. Even though, vine ripening is the secret to success it has not been possible, until now. Genetic engineering was once thought of to be impossible, but today we are capable ... genetic engineering is imprecise and unpredictable. By inserting genes from organisms that have never been eaten as food, new proteins are introduced into the human and animal food chains. There is concern that these could cause serious environmental problems, or worse it can cause health problems to ... f...

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... frog cell, and then allow the egg to develop into a tadpole. This "Nuclear transfer" transplants an animal gene into an egg. The tadpole is therefore a clone of the embryo that donates its nucleus. In 1975 scientists got tadpoles after transferring cell nuclei from adult frogs. Over a decade later, in ... 1986, a sheep was cloned by nuclear transfer of embryonic cells. Dolly, the first cloned sheep was introduced to the world. In 1998 more than 50 mice were reported cloned from a single ... for clinical trials in patients with irreversible brain and spinal damage. Reproductive cloning ...

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