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What do monomers combine to produce
Chemists combine various types of monomers in many different arrangements to make an almost infinite variety of plastics with different chemical properties.
Expert answered|Caprisun|Points 489|
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Asked 9/13/2011 10:45:21 PM
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who starred in 'casablanca'
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why would genetic differences be an unavoidable experiment error if a scientist studies a rare species of frog
Weegy: Evolution may in the long term lead to speciation, whereby a single ancestral species splits into two or more different species. [ Speciation is visible in anatomical, genetic and other similarities between groups of organisms, geographical distribution of related species, the fossil record and the recorded genetic changes in living organisms over many generations. Common descent stretches back over 3.5 billion years during which life has existed on earth.Both evolution within populations and speciation between them are thought to occur in multiple ways such as slowly, steadily and gradually over time or rapidly from one long static state to another. ] (More)
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Asked 9/12/2011 10:53:05 PM
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why would genetic differences be an unavoidable experiment error?
Weegy: A study led by McGill University researchers has demonstrated that small differences between individuals at the DNA level can lead to dramatic differences in the way genes produce proteins. [ These, in turn, are responsible for the vast array of differences in physical characteristics between individuals. This study solves in part the mystery of how a relatively small number of differences within DNA protein coding sequences could be responsible for the enormous variety of phenotypic differences between individuals. It had previously been shown that individual differences reside in simple, relatively small variations in the DNA sequence called single nucleotide polymorphisms (SNPs, often pronounced "snips"), which exist primarily in the "junk code" of the DNA not previously known to have any profound genetic effect. "There are many SNPs," explained Dr. Jacek Majewski of McGill University. "If you add them all together, you'd expect that two individuals would differ at more than a million of those positions. So we have a million or more small differences that distinguish you and me, and yet it would be very hard to explain all the phenotypic differences in the way we look, grow, and behave just by the handful of these protein coding differences." Majewski and his colleagues have demonstrated that the natural processing of messenger RNA (mRNA), via a process called splicing, is genetically controlled by these SNPs. The SNPs in certain individuals lead to changes in splicing and result in the production of drastically altered forms of the protein. These out-of-proportion consequences may lead to the development of genetic diseases such as cystic fibrosis and Type 1 diabetes. The study, part of the Genome Regulators in Disease (GRID) Project funded by Genome Canada and Genome Quebec, was led by Dr. Jacek Majewski of McGill University's Department of Human Genetics and the McGill University and Genome Quebec Innovation Centre, and first-authored by his ... (More)
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why is it not good, if a hypothesis cannot be tested
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Asked 9/13/2011 10:08:44 PM
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