Dear EarthTalk: How Are Scientists Using DNA to Conserve Wildlife? -- Jake Summerlin, Newark, NJScheer, Roddy
1. Why do scientists use DNA information from elephants? A.To improve the health of elephant tusks. B.To keep track of the illegal dealers. C.To protect elephants against natural disasters. D.To research into elephants’ habits.2. What may make illegally hunted elephant tusks hard to find?
Define DNA fingerprinting, What is Electrophoresis, and how can we benefit from this technology today? How do scientists use recombinant DNA? How does the structure of DNA encode genetic information? How does DNA have directionality? What is automated DNA sequencing?
So, scientists had theorized about the informational role of DNA for a long time, but nobody knew how this information was encoded and transmitted. Many scientists guessed that the structure of the molecule was important to this process. In 1953, James D. Watson and Francis Crick discovered th...
Describe a genetic technology that can aid scientists in discovering organisms that have similar DNA sequences. Explain how a human gene is removed from a chromosome, and placed into a plasmid. A bacterial plasmid replicates at the same rate as ...
In 1961,another two scientists found the first "word" that they could understand in that language.It shows how DNA tells the cell (细胞)to build its parts,(有几个单词看不清) the words in the DNA map,but we still do not understand what they all do.By understanding what just one "...
every body of water is a slurry of sloughed-off cells. What’s more, scientists have recently devised methods by which they can sift out the DNA sequences in that slurry to differentiate between a blue crab, a blue whale or even a Loch Ness Monster—without ever laying an ...
She takes us to the farms in East Africa where she's working with a diverse team of scientists to help farmers keep their crops healthy using a portable DNA lab and mini supercomputer that can identify viruses in hours, instead of months. science technology DNA collaborati...
【题文】 Scientists have discovered how cancer cells use an ‘‘invisibility cloak’’ to hide from the immune system. They hope understanding the mechanism(机制,原理) will lead to therapies(疗法)in five to ten years that force cancer cells into the firing line of the body’s defenses. Such...
All living things store their DNA in a central nucleus (细胞核) inside the cells of their bodies. This complete set of DNA is called a genome (基因组). Every cell in the body has a copy of this genome. A team of scientists at the Save Our Seas Foundation Shark Research Center at ...