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
62
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:http://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
Athiefdroppedawinninglotteryticket(彩票)atthesceneofhiscrime,buthe
[originaltext]ShouldIhandouttheapplicationsnoworwaituntillater?(A)Th
Irelandhasalottoofferthetravelerbesidesitsfamouslygreencountrysid
坚持自身经营的独特性,不论经营单项、专项、多项或综合等业务,都不与其它部门合作的
下列与切面厚度伪像(部分容积效应伪像)有关的是A.超声束较宽 B.超声发射频带
一般情况下,肾移植手术中供肾动脉与受者的哪条动脉连接A.腹主动脉 B.髂内或髂
关于城市变电所(站)规划选址的表述中,正确的是( )。A.靠近负荷中心 B.
下列关于资产支持证券的陈述,错误的是()。A:发起机构在最近3年内没有重大违法违
下列不属于针对会计估计实施的风险评估程序的是()。A.了解适用的财务报告编
(2021年真题)某项目施工合同约定承包人承担的钢筋价格风险幅度为±5%,超出部
最新回复
(
0
)