首页
登录
职称英语
What is the focus of the passage? [originaltext] Scientists have discovered m
What is the focus of the passage? [originaltext] Scientists have discovered m
游客
2024-10-12
15
管理
问题
What is the focus of the passage?
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、Food engineering.
B、Water using of plants.
C、Photosynthesis of plants.
D、Carbon dioxide and plants.
答案
B
解析
主旨大意题。由第一句话可知本文的话题是:科学家们发现了植物利用水的新方法。
转载请注明原文地址:https://tihaiku.com/zcyy/3798675.html
相关试题推荐
ButtheSwissdiscoveredlongyearsagothatconstantwarfarebroughtthem______
Accordingtothepassage,anidealmarriagelife______.[br][originaltext]
Whatdothespeakersmainlydiscuss?[br][originaltext]M:Let’sgoswimmingov
Whatdothespeakersmainlydiscuss?[br][originaltext]M:Let’sgoswimmingov
Whatdothespeakersmainlydiscuss?[originaltext]M:Let’sgoswimmingoverat
Whichofthefollowingismostlikelytheplacethemanvisits?[originaltext]W:
JohnWilliams’houseismadeof[br][originaltext]Morethan40yearsago
JohnWilliams’houseismadeof[br][originaltext]Morethan40yearsago
Whydidherneighborsgoupontheroof?[br][originaltext]M.Hi,Jane...Say
Howardisprobably[br][originaltext]W:Hi,Howard.Whatareyouworkingon?M
随机试题
Sofar,therobotseemstobethebest,servantinthehouse.Youcan【B1】___
在我国,1月8日,某交易者进行套利交易,同时卖500手3月白糖期货合约、买入1000手5月白糖期货合约、卖出500手7月白糖期货合约;成交价格分别为63
Thenation’smurderratedeclinedlastyearforthefirsttimeinfouryears
以下是异相睡眠特征的是A、唤醒阈降低 B、生长激素分泌明显增强 C、脑电波呈
因护理记录缺陷造成的护理质量缺陷属于A.护理管理不善造成的缺陷 B.违反护理规
出厂局部放电试验测量电压为1.5Um/√3时,(____)电压等级变压器高、
运输结构优化的原则有( )。A.运输结构的优化要适应产业结构的需求 B.运输
某基坑开挖深度为6m,土层依次为人工填土、黏土和含砾粗砂,如图所示。人工填土层,
A.奥司他韦 B.阿糖腺苷 C.干扰素 D.阿昔洛韦 E.阿德福韦酯抗乙
施工质量控制的项目专用性依据包括()。A.本项目的工程建设合同 B.勘察设计
最新回复
(
0
)