Today in Green science, we studied chromosomes and how they develop into Sex cells. I learned that the chromosomes, first duplicate themselves, then move to the end of the cell and split into new cells. They duplicate themselves again to make four new cells. I also learned that , in the human body, there are 46 chromosomes in the body cell, and exactly half of that in a sex cell.
In a goldfish, there are at least 90 some chromosomes in the body cell; more than the chromosomes in the human body cell. I learned that the X chromosome is larger than the Y chromosome. According to CNN, the Y chromosome has at least 21 different genes unique to men, which control the operation of the body down to the cell. to read more about this article, then click here: http://www.cnn.com/2005/TECH/science/02/14/gender.brain/index.html
On a different site, http://en.wikipedia.org/wiki/Chromosomes, Chromosomes are a single large macromolecule in the DNA.
Wednesday, January 24, 2007
Monday, January 15, 2007
Amazing Comet!
The comet Mcnaught was rounding the sun over the past few days and can be seen with binoculars in Broad Daylight! until 11:00 AM eastern time, the SOHO spacecraft can take near-live images of comet Mcnaught. Every noon, the comet will have gone closer to the southern hemisphere and farther from the sun. On the astromoners' brightness scale, where the lower numbers are brighter and negative numbers are the brightest of them all, the comet Mcnaught is negative 5. Comparing with other space objects, Venus is a mere negative 4 (brighter than any star) and the moon is a bright 12.7. Mcnaught was the brightest since 1965, even though it was discovered last August. It is also far brighter than Comet Hale-Bopp, widely seen in 1995. The astronomers started seeing Mcnaught yesterday soon after the local sunset. For more information, click here: http://space.com/spacewatch/070114_comet_mcnaught.html
Friday, January 12, 2007
Current event blog:
British Climate scientists hypothesize that 2007 will be the hottest, because of high levels of persistant greenhouse gases, as well as El Nino, the cyclical warming trend that is, at the moment, occuring in the Pacific Ocean. El Nino happens irregularly; the last one was five years ago, in 2002, as well as in 1997 and 1998. El Nino, this year, added with the steady increase of global warming, due to human activity, may break Earth's temperatre levels. The good thing about El Nino is that it leads to a less chance that Northeastern US will be hit with a hurricane. to find this article and many other related articles, click here:http://www.livescience.com/environment/070104_ap_warmest_year.html
Thursday, January 4, 2007
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