《2025年金考卷名师名题单元双测卷高中英语必修第三册译林版》

D
Many people run away when they hear a bee coming. But some plants also "respond" to insect sounds. A new study finds that snapdragons, a common garden flower, can tell the difference between the sounds of helpful pollinators (传粉者) and harmful nectar (a sweet thing produced by flowers) stealers — and change their nectar's sugar levels accordingly.
This discovery comes from a research project by scientists in Italy, Spain, and Australia. Insect biologist Francesca Barbero led the study. Her team had noticed that some insects, like certain bees, enter snapdragon flowers and help them produce more seeds (种子) by pollinating. Snapdragons, hence, sweeten their nectar to attract them. But other insects, such as some bumblebees, make holes in the flowers to steal nectar without pollinating — these are nectar stealers.
Barbero wondered if snapdragons could "hear" and tell apart the different sounds of these insects. A 2019 study had shown that evening primroses sweetened their nectar when bees approached, which might be due to sound. To test this, Barbero's team recorded sounds: one from a helpful solitary bee that improves seed production, one from a nectar-thief bumblebee, and pink noise, which is a common natural background noise, as a control condition. They played these sounds to indoor snapdragons using speakers. No real bees were included. The team measured nectar sugar levels after 10 minutes, 3 hours, and 5 days, and checked gene (基因) activity of the plants over that time.
Pink noise had no effect. But within 10 minutes of hearing the helpful bee's sounds, snapdragons added sugar to their nectar — likely to encourage more visits. Surprisingly, when the team played the stealer's sounds, the plants made nectar with less sugar. This effect lasted at least 5 days, probably because of changes in gene activity. The team did a full screening of the genes and found that some became more active — others less so — depending on the sound, likely affecting sugar movement in nectar.
Alessandro Cini, a behavioral ecologist not involved in the study, called the work "extremely exciting". He suggested, "It could lead to new ways to monitor insects or control plant responses, and shows more about the long co-evolution between insects and flowers — a relationship that can be used to shape our world."
32. Why do snapdragons make sweeter nectar for pollinators?
A. To keep nectar stealers away.
B. To get more seeds.
C. To produce more honey.
D. To reduce pink noise.
33. What do we know from the study?
A. Plants can be smarter than expected.
B. Flowers react to insect sounds similarly.
C. Gene changes produce more nectar sugar.
D. Pink noise was of little use in the experiment.
34. What is Alessandro Cini's suggestion about?
A. Necessary praise for the study.
B. Possible direction for future study.
C. Potential application of the findings.
D. A need to test more insects and flowers.
35. What's the best title for the text?
A. Plants react sweetly to pollinators
B. Snapdragons' sweet nectar
C. Helpful bees differ from nectar stealers
D. Flowers and insect activities

答案： 32. B 细节理解题。根据第二段中的“certain bees, enter snapdragon flowers and help them produce more seeds(种子) by pollinating. Snapdragons, hence, sweeten their nectar to attract them”可知，某些蜜蜂会进入金鱼草的花朵，通过授粉帮助它们产生更多种子，因此金鱼草会将花蜜变甜以吸引这些蜜蜂，故金鱼草为授粉者提供更甜的花蜜是为了吸引授粉者从而获得更多的种子。
33. A 推理判断题。根据第四段的“Pink noise had no effect…the plants made nectar with less sugar”可知，粉红噪声对金鱼草没有影响，但在听到有益蜜蜂的声音后，金鱼草就往花蜜里增加了糖分，令人惊讶的是，当播放盗花蜜的蜜蜂的声音时，金鱼草的花蜜反而含糖量降低。由此可知，该研究表明，金鱼草不仅能够区分不同昆虫的声音，还能根据声音调整花蜜糖分，这令人吃惊，因此该研究告诉我们金鱼草比我们想象的要聪明。
34. C 推理判断题。根据最后一段中Alessandro Cini的话“It could lead to new ways to…a relationship that can be used to shape our world”可知，Alessandro Cini认为该研究的研究结果可能为监测昆虫和控制植物反应提供新的方式，揭示了昆虫与花朵长期共同进化的更多信息，这种共同进化关系能被用来改变我们的世界，这些都是该研究结果在现实生活中的应用潜力。
35. A 标题判断题。