易哈佛 \ 2020年高中英语

Plants can’t communicate by moving or making sound...

2020年高中英语考点真题库

[单项选择题]Plants can’t communicate by moving or making sounds, as most animals do. Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas . flower’s sweet smell, for example, comes from volatile compounds that the plant produces to attract insects such as bugs and bees. Plants can also detect volatile compounds produced by other plants. tree under attack by hungry insects, for instance, may give off volatile compounds that let other trees know about the attack, In response, the other trees may send off chemicals to keep the bugs away- or even chemicals that attract the bugs’ natural enemies. Now scientists have created a quick way to understand what plants are saying: a chemical sensor(传感器) called an electronic nose. The “e-nose” can tell compounds that crop plants make when they’re attacked. Scientists say the e-nose could help quickly detest whether plants are being eaten by insects, But today the only way to detect such insects is to visually inspect individual pl

关键词: plants compounds volatile
A:making some sounds
B:waving their leaves
C:producing some chemicals
D:sending out electronic signals

请使用微信扫描二维码,获取题库。

微信

请使用微信扫描二维码,获取验证码。

微信