首页
登录
职称英语
What is the focus of the passage? [br] [originaltext] Scientists have discov
What is the focus of the passage? [br] [originaltext] Scientists have discov
游客
2023-11-13
55
管理
问题
What is the focus of the passage? [br]
Scientists have discovered more details about how plants use water. Their findings could help to engineer plants that grow better and more effectively in conditions with higher levels of carbon dioxide. Plants naturally take in carbon dioxide they need for photosynthesis, the process of changing light energy to chemical energy. The carbon dioxide enters the plants through tiny holes or pores on the surface of leaves. However, each time a plant takes in one molecule of carbon dioxide gas, it loses hundreds of water molecules. Scientists say plants lose ninety-five percent of the water they take in through these pores. Some plants’ pores can tighten to save water during conditions of high carbon dioxide. Other plants are not able to do this as well. Now, scientists know how these tiny pores tighten in plants. They identify proteins that control the tightening of a plant’s pores. The proteins are enzymes called carbonic anhydrates. They believe the enzymes could be changed in some plants to increase their ability to store water. Changing plants to save more water will not affect plant growth. This method might be used to help engineer food crops that are resistant to extremely dry conditions. It could help farmers meet a growing demand for food as water supplies decrease.
选项
A、Carbon dioxide.
B、Chemical energy.
C、Molecule.
D、Proteins.
答案
D
解析
细节题。植物利用水的关键是一种蛋白质。
转载请注明原文地址:https://tihaiku.com/zcyy/3184112.html
相关试题推荐
Wheredidtheconversationmostlyprobablytakeplace?[br][originaltext]W:Ok
Whatarethetwopeopletalkingaboutinthisconversation?[originaltext]M:Let
SomeHaitiansareonstrikeinorderto______.[br][originaltext]Haitianhu
SomeHaitiansareonstrikeinorderto______.[originaltext]Haitianhungers
WhichofthefollowingstatementsisNOTtrueaboutJamesPardrew?[originaltext
Whathappenedduringtheaccident?[br][originaltext]Anundergroundtrain
thespaceshuttleDiscoverycompleteda______missionuponitsreturntoKennedy
Thepoxvirusvaccineisaimedto______[originaltext]Chinesescientistsadmin
OneofthereasonsthatBombardierplanstocutjobswasthat[originaltext]
WhenwasthefirstOlympicGamesheld?[br][originaltext]TheOlympicGam
随机试题
Afterthebirthofmysecondchild,Igotajobatarestaurant.Havingwork
•YouwillheararadiointerviewwithMarthaFlowers,theManagingDirectoro
Atpresent-companiesandindustriesliketosponsorsportsevents.Tworeason
()售后服务()版权所有[br]()技术密集型()盗版商品O,H
Throughouthistorymanhashadtoacceptthefactthatalllivingthingsmus
下列内容中,属于建筑安装工程施工图预算编制依据的是( )。 A、预算工作手册
《国家中长期教育改革和发展规划纲要(2010~2020年)》提出,坚持以人为本、
居住项目的市场前景受附近地区人口数量、家庭规模和结构、家庭收入水平、人口流动性、
报关单位有下列( )情形时,海关暂停其报关权. A.报关企业出让其名义供他人
根据《工业炉窑基建筑工程的施工及验收规范》,不属于工序交接证明内容的( )。A.
最新回复
(
0
)