【OG20-P432-539题】According to the passage, which of the following i_OG18新题_-{$seo

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Resin is a plant secretion that hardens when exposed to air; fossilized resin is called amber. Although Pliny in the first century recognized that amber was produced from "marrow discharged by trees," amber has been widely misunderstood to be a semiprecious gem and has even been described in mineralogy textbooks. Confusion also persists surrounding the term "resin,"which was defined before rigorous chemical analyses were available. Resin is often confused with gum, a substance produced in plants in response to bacterial infections, and with sap, an aqueous solution transported through certain plant tissues. Resin differs from both gum and sap in that scientists have not determined a physiological function for resin.

In the 1950s, entomologists posited that resin may function to repel or attract insects. Fraenkel conjectured that plants initially produced resin in nonspecific chemical responses to insect attack and that, over time, plants evolved that produced resin with specific repellent effects. But some insect species, he noted, might overcome the repellent effects, actually becoming attracted to the resin. This might induce the insects to feed on those plants or aid them in securing a breeding site. Later researchers suggested that resin mediates the complex interdependence, or "coevolution," of plants and insects over time. Such ideas led to the development of the specialized discipline of chemical ecology, which is concerned with the role of plant chemicals in interactions with other organisms and with the evolution and ecology of plant antiherbivore chemistry (plants' chemical defenses against attack by herbivores such as insects).

【OG20-P432-539题】

According to the passage, which of the following is true of plant antiherbivore chemistry?

A

Changes in a plant’s antiherbivore chemistry may affect insect feeding behavior. 分析A选项
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B

A plants repellent effects often involve interactions between gum and resin. 分析B选项
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C

A plants antiherbivore responses assist in combating bacterial infections. 分析C选项
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D

Plant antiherbivore chemistry plays only a minor role in the coevolution of plants and insects. 分析D选项
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E

Researchers first studied repellent effects in plants beginning in the 1950s. 分析E选项
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当前版本由 Edward. 更新于2021-05-09 16:58:13 感谢由 Edward. 对此题目的解答所做出的贡献。

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1. 细节题

But some insect species, he noted, might overcome the repellent effects, actually becoming attracted to the resin. This might induce the insects to feed on those plants or aid them in securing a breeding site.

A. 正确，PAC对食草动物的进食产生影响

B. 第一段提到用gum来抵制细菌感染，但没有提到gum和PAC的联系

C. Gum的作用是抵制细菌感染

D. 第二段提到PAC在化学生态中起到重要作用，而化学生态学主要研究植物昆虫的共同进化

E. 没有提到是不是第一次

题目讨论（7条评论）

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贾思敏

最后一句：plant antiherbivore chemistry (plants' chemical defenses against attack by herbivores such as insects.误导人这一句才是正主：But some insect species, he noted, might overcome the repellent effects, actually becoming attracted to the resin. This might induce the insects to feed on those plants or aid them in securing a breeding site.

3 0 回复 2021-10-07 18:28:09
210

A mis--gem R mis--gum & sap 1950：ento：repel & attract 虫 F： evolved over time BUT: some overcome--attract resin--aid Later： mediate（虫草）--che eco

1 0 回复 2019-09-28 12:30:17
merlin

Resin is often confused with gum, a substance produced in plants in response to bacterial infections, and with sap, an aqueous solution transported through certain plant tissues. 为什么说B没提到？

0 0 回复 2018-06-28 22:03:57
小爱奈回复merlin

其实你自己已经找出来了。。。解决bacterial infections的是gum,而非resin

0 0 回复 2018-08-06 16:40:43
29522185

OG18不是这题

0 0 回复 2018-06-03 13:49:33
Cure回复29522185

OG19的题啊

0 0 回复 2018-09-04 16:21:30
千千

纠结AE 现在分析的话 E 原文是说1950年代有人提出了resin 在驱逐昆虫上的作用。但是并不是说1950年代科学家才开始研究昆虫驱逐也就是说可能之前就有研究昆虫的驱逐效应（比方说植物会分泌物质驱逐昆虫啊，植物一般驱逐那些昆虫啊），但在1950年代科学家才把植物分泌的resin和这种驱逐效应联系起来，即resin被分泌用来驱逐昆虫的 A 原文：This might induce the insects to feed on those plants or aid them in securing a breeding site.原文说resin 可能引诱昆虫前来吃这些植物，既然是昆虫的食物就有可能影响昆虫的feeding behaviour 而选型后面用的是may 对比DE的only first保险很多

0 0 回复 2017-11-13 17:13:48
百香果蜂蜜茶

A选项（对）从第二段我们可以看出，植物一开始分泌出resin是为了 response to insect attack，而到后来一些insect 反而被resin所吸引前来啃食这些植物，所以我们可以看出resin确实改变了 insect's feeding behavior
B选项（错）该选项描述的内容，文章未提及到
C选项（错）如文章中所说植物的antiherbivore的作用是用来 against predator 而不是 bacterial infection
D选项（错）文章中提到的是antiherbivore chemistry plays a major role.. 而不是 minor，其实当我们看见Only这种字眼的时候就要对该选项建立起一种不好的感觉
E选项（错）文章并没有提到这是第一次

1 0 回复 2017-08-10 15:35:01
百香果蜂蜜茶

A选项（对）从第二段我们可以看出，植物一开始分泌出resin是为了 response to insect attack，而到后来一些insect 反而被resin所吸引前来啃食这些植物，所以我们可以看出resin确实改变了 insect's feeding behavior B选项（错）该选项描述的内容，文章未提及到 C选项（错）如文章中所说植物的antiherbivore的作用是用来 against predator 而不是 bacterial infection D选项（错）文章中提到的是antiherbivore chemistry plays a major role.. 而不是 minor，其实当我们看见Only这种字眼的时候就要对该选项建立起一种不好的感觉 E选项（错）文章并没有提到这是第一次

1 0 回复 2017-08-09 15:04:50