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
外语
When we think of animals and plants, we have a pretty good way of dividing them into two distinct groups: one converts sunlight
When we think of animals and plants, we have a pretty good way of dividing them into two distinct groups: one converts sunlight
admin
2022-07-23
46
问题
When we think of animals and plants, we have a pretty good way of dividing them into two distinct groups: one converts sunlight into energy and the other has to eat food to make its energy. Well, those dividing lines come crashing down with the discovery of a sea slug (海蛞蝓) that’s truly half animal and half plant. It’s pretty incredible how it has managed to hijack the genes of the algae (藻类) on which it feeds.
The slugs can manufacture chlorophyll, the green pigment (色素) in plants that captures energy from sunlight, and hold these genes within their body. The term kleptoplasty is used to describe the practice of using hijacked genes to create nutrients from sunlight. And so far, this green sea slug is the only known animal that can be truly considered solar-powered, although some animals do exhibit some plant-like behaviors. Many scientists have studied the green sea slugs to confirm that they are actually able to create energy from sunlight.
In fact, the slugs use the genetic material so well that they pass it on to their future generations. Their babies retain the ability to produce their own chlorophyll, though they can’t generate energy from sunlight until they’ve eaten enough algae to steal the necessary genes, which they can’t yet produce on their own.
"There’s no way on earth that genes from an alga should work inside an animal cell," says Sidney Pierce from the University of South Florida. "And yet here, they do. They allow the animal to rely on sunshine for its nutrition. So if something happens to their food source, they have a way of not starving to death until they find more algae to eat. "
The sea slugs are so good at gathering energy from the sun that they can live up to nine months without having to eat any food. They get all their nutritional needs met by the genes that they’ve hijacked from the algae.
What does the author say about baby sea slugs?
选项
A、They can live without sunlight for a long time.
B、They can absorb sunlight right after their birth.
C、They can survive without algae for quite some time.
D、They can produce chlorophyll on their own.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/c4nD777K
0
大学英语四级
相关试题推荐
Thereisdistinctionbetweenreadingforinformationandreadingforunderstanding.【B1】________Thefirstsenseistheonei
Thereisdistinctionbetweenreadingforinformationandreadingforunderstanding.【B1】________Thefirstsenseistheonei
Therelationshipbetweenthehomeandmarketeconomieshasgonethroughtwodistinctstages.Earlyindustrializationbegant
EachtimeItaketheunderground1findmyself【K1】________(surround)bydozensofpassengersplayingsmart-phones.Theyalmostw
Whatisthesourceofeachonebelowinthissurvey?AradioBcouncilmeetingCthetelevisionDnewspaperEjournal
Whatisthesourceofeachonebelowinthissurvey?AradioBcouncilmeetingCthetelevisionDnewspaperEjournal
Properarrangementofclassroomspaceisimportanttoencouraginginteraction.Today’scorporationshirehumanengineeringspec
WhenindustrybecamemoreimportantthanagricultureinthelifeofAmericanpeople,familiesbecamesmallerthaneverbefore.
A—BankguaranteeJ—TotalvalueB—CustomsdutiesK—TradestatisticsC—NetpriceL—SalesrepresentativeD—S
随机试题
患儿,8个月,因面色黄来诊。自幼母乳喂养,未加辅食。初诊为营养性巨幼红细胞贫血。下述处理最重要的是
儿童肥胖症的诊断标准是体重超过同年龄、同身高小儿正常标准的
A.胎方位B.胎产式C.胎势D.胎先露E.横产式最先进入骨盆入口的胎儿部分称为
临床上出现典型牙龈炎表现为什么期结合上皮继续向根方增殖,开始形成牙周袋为什么期
外购燃料主要包括( )。
下列关于收入确认时间的说法中,正确的是()。
阅读下面材料,回答问题。××县××村是著名的冬枣生产加工基地.冬枣产业是该村的重要经济支柱。该村村口的一座水泥桥是运输冬枣的主要通道。2012年12月8日,该桥大梁出现裂痕,桥面随时有塌落的危险.现已不能通行机动车辆,不仅影响冬枣运输,而且危及过往行人的
当下,最需要培育的好“种子”,首先是在脑子里,不能只把引进洋品种当作“与时俱进”,还自以为得了风气之先,忙不停地总结报告,而一谈起自身的种业发展,就大摆困难,畏首畏尾。要知道培育好种子,一定的物质条件固然重要,但越是有困难,就越需要一种志气和眼光,越需要依
下列关于编辑框的说法中,不正确的是( )。
WhatdistinguishedtheEnglishRomanticpoets?
最新回复
(
0
)