【Phat Yeti出品】60-SECOND SCIENCE 官方听力文稿 + 讨论帖 （更新至：2008.03.07）

zhoushengyuanlyUID: 2246479

:kiss: up

lintelleUID: 2297267

主id出动计数

2~

某人快翘辫子了。:rolleyes:

zhoushengyuanlyUID: 2246479

up

zhoushengyuanlyUID: 2246479

;d: :o

深海lavenderUID: 2350207

换了很多人?
不认识就不认识吧,等拿到OFFER再去水,就认识了.

深海lavenderUID: 2350207

考试前最后一水帖.
我是很水.
但不该水的时候不水.比如考试.
这点自制力还是有的.

周三上午考完试,下午再回来.

zhoushengyuanlyUID: 2246479

cong offer...你只是时间早晚的问题。。。不过话说回来，，再哪不是水;d:

zxj01UID: 2395442

好东西啊

zhoushengyuanlyUID: 2246479

up

sunny_hangzhouUID: 118188

Palm's Magnificent Death May Save Its Life

Talk about a desperate cry for attention—a palm tree discovered inMadagascar literally flowers itself to death. At the end of its lifecycle, a pyramid of hundreds of tiny white flowers spring from the topof the tree. The flowers drip with nectar, announcing the palm’s swansong to swarms of birds and insects. Once pollinated, the tree sendsall remaining nutrients to its flowers as they develop into fruit. Thenit collapses and dies.

According to the Kew Royal Botanical Gardens in London, which announcedthe discovery, the tree also has a remarkable life. It stands fiftyfeet above the ground and has fan-shaped leaves that, at fifteen feetin diameter, rank among the largest of any flowering plant. It’sMadagascar’s most massive palm tree and can even be spotted on GoogleEarth. What’s more, DNA analysis shows it’s not just a new species, butan entirely new genus. This discovery comes right in time—fewer than ahundred of the palms still exist. Conservationists are now scramblingto find survivors and harvest seeds. Lucky for the tree, it puts on onecan’t-miss performance.

[ 本帖最后由 豆豆～ 于 2008-1-29 09:14 编辑 ]

zhoushengyuanlyUID: 2246479

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sunny_hangzhouUID: 118188

Mice Legs Longer With Batty Gene Regulation

When you hear things like: human DNA differs from chimp DNA by only a couple percent, you can’t help but wonder, how can that be? How can so few changes make such a big difference? Researchers working with fruit bats and mice think they have an answer. And it lies less in the animals’ genes than in the short snippets of DNA that control when and where and how vigorously genes are turned on.

If you’ve ever thought that a bat is basically just a rodent with wings, you’re not too far from the mark. One of the most obvious differences between bats and mice is their forearms. Mice have these stubby little legs, and bats have these large leathery wings. But even those differences are not as major as you might imagine. Mice and bats both have a gene called Prx1, which regulates limb development. But the gene is more active in the budding wings of bats. So the researchers took the piece of DNA that controls Prx1 activity from a bat and stuck it into a mouse. The result pictured in the January 15 issue of Genes and Development: mice that have longer front legs. Ok, they didn’t sprout wings, but the study shows that even small changes can have big consequences.

—Karen Hopkin

zhoushengyuanlyUID: 2246479

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jason_IUID: 2449660

up
好贴
最后四天的在第一个贴子里的页码是错的

深海lavenderUID: 2350207

回来了.
UP一下.

上天保佑我考的好...考的好...合爪祈祷下.
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