首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Just over three years old and about four-feet tall. Methuselah is growing well. "It’s lovely." Dr. Sarah Sallon said of the dat
Just over three years old and about four-feet tall. Methuselah is growing well. "It’s lovely." Dr. Sarah Sallon said of the dat
admin
2012-02-27
32
问题
Just over three years old and about four-feet tall. Methuselah is growing well. "It’s lovely." Dr. Sarah Sallon said of the date palm,whose parents may have provided food for the besieged Jews at Masada some 2 000 years ago. The little tree was sprouted in 2005 from a seed recovered from Masada, where rebelling Jews committed suicide rather than surrender to Roman attackers.
Radiocarbon dating of seed fragments clinging to its root, as well as other seeds found with it that didn’t sprout, indicate they were about 2 000 years old—the oldest seed known to have been sprouted and grown.
Sallon, director of the Louis L. Borick Natural Medicine Research Center at Hadassah Medical Organization in Israel, updates the
saga
of Methuselah in Friday’s edition of the journal Science.
One thing they don’t know yet is whether it’s a boy or girl. Date palms differ by sex, but experts can’t tell the difference until the tree is six or seven years old, Sallon said.
She hopes there’s a chance to use it to restore the extinct Judean date palm, once prized not only for its fruit but also for medicinal uses.
The researchers have had a look at the plant’s DNA, however, and found it shares just over half its genes with modern date cultivars(栽培品种).
"Part of our project is to preserve ancient knowledge of how plants were used," Sallon said in a telephone interview. "To domesticate them so we have a ready source of raw material. "
Her Middle Eastern Medicinal Plant Project is working to conserve and reintroduce plants to the region where they once lived.
"Many species are endangered and becoming extinct. Raising the dead is very difficult, so it’s better to preserve them before they become extinct," she said.
The oldest documented seed to be grown previously was a 1 300-year-old lotus, Sallon said.
What do we know about Methuselah’s sex?
选项
A、It will be made clear within a year or two.
B、It will remain a myth for at least a decade.
C、It won’t be known until several years later.
D、It won’t be decided without ancient knowledge.
答案
C
解析
第四段说研究人员现在还不知道Methuselah的性别。海枣树是分性别的,但是一般要等它们长到六七岁才能区分性别。第一段第一句就说Methuselah刚过三岁,因此需要再过几年才能知道它的性别。
转载请注明原文地址:https://kaotiyun.com/show/R7mi777K
0
在职申硕(同等学力)英语
相关试题推荐
新兴产业的发展障碍有()。
ShouldEnglishclassesbecompulsoryattheelementaryorprimaryschoollevelincountrieswhereitisnotthenativelangue?
Hepointedoutthata(considerable)gap(existing)betweenthenumberofhourspeople(arepaid)forworkingandthenumberof
Americanculturehasnotbeenimmunetoculturalinfluencesfromoutside.TheideaofdemocracycamefromtheancientGreeks:th
______ofthefinancialcrisis,alltheycoulddowasholdonandhopethatthingswouldimprove.
Theybelievethatthemerchantshadconspiredtounderminethenation’seconomicindependence.
Discoveriesinscienceandtechnologyarethoughtbymanytocomeinblindingflashesorastheresultofdramaticaccidents:Si
Americanculturehasnotbeenimmunetoculturalinfluencesfromoutside.TheideaofdemocracycamefromtheancientGreeks;th
A.Xiamenisarapidlygrowingmoderncitywithavigorouseconomy.B.MincuisineisoneoftheeightmostfamouscuisinesofC
随机试题
根据《招标投标法》的规定,下列关于招标代理机构职责的表述中不正确的是()。
【2009年第4题】题16~20:某企业110kV变电站直流系统电压110V,采用阀控式密闭铅酸蓄电池组,无端电池,单体电池浮充电2.23V,直流系统不带压降装置,充电装置采用一组20A的高频开关电源模块若干个,站内控制负荷、动力负荷合并供电。请回答以下问
电器配线工程应根据其( ),以单线“m”为计算单位,按设计图示尺寸以延长米计算。
蜗轮蜗杆传动是用于传动空间互相()而不相交的两轴间的运动
在邀请招标的程序中( )。
当事人对其所受的行政处分不服的,只能通过()来解决。
某企业发行债券,票面利率10%,发行费率为2%,所得税率为33%,则债券资金成本为()。
阅读以下说明,回答问题l至问题3,将解答填入答题纸的对应栏内。【说明】现代软件的飞速发展,使得系统对软件的依赖越来越强,对软件可靠性的要求也越来越高,因此发展以发现软件可靠性缺陷为目的的可靠性测试技术也日益迫切。解释说明软件可靠性测试的目的
Itisdangeroustowalkthroughathickforest______awinterafternoonwithoutaguide.
Rockclimbingisanactivityinwhichparticipantsclimbup,downoracrossnaturalrockformationsorartificialrockwalls.Th
最新回复
(
0
)