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【OG20-P607-755题】
In Colorado subalpine meadows, nonnative dandelions co-occur with a native flower, the larkspur. Bumblebees visit both species, creating the potential for interactions between the two species with respect to pollination. In a recent study, researchers selected 16 plots containing both species; all dandelions were removed from eight plots; the remaining eight control plots were left undisturbed. The control plots yielded significantly more larkspur seeds than the dandelion-free plots, leading the researchers to conclude that the presence of dandelions facilitates pollination (and hence seed production) in the native species by attracting more pollinators to the mixed plots.
Which of the following, if true, most seriously undermines the researchers’ reasoning?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
在科罗拉多S草甸,非本地的D和本地花L共存。黄蜂会光顾这两种植物,可能导致两物种在交叉授粉。最近的研究中,研究者选取了16个地区种两种植物。所有D从8个区移除了;余下的8个控制地区未打扰。L在控制区比除去D的地区产生了多得多的种子,于是研究者得出结论,D的存在吸引了更多授粉昆虫来到混种区,从而对本地物种的授粉(因此种子产出增强)有益
削弱题
A 黄蜂在混种区更多光顾D;说明D更吸引授粉昆虫,增强,方向反,排
B 混种区,授粉昆虫能从在两个物种间授粉,增加种子产出;增强,方向反,排
C 如果不管制,外地物种如D很快挤掉本地物种;而原文反而是L产生了更多种子,违背题干事实,排
D 种子发芽是一种比种子生产更有效的方式保证物种茁壮;无关,排
E 土壤翻动导致更少开花,因此更低的种子产出;他因削弱,正确
willowX
论证目的是削弱“吸引更多昆虫传粉”,而选项B是“使得两个物种间授粉”,这不是他因吗??
wordy要你吗
wordyao,这个题感觉跟开discount商场那个并列og最难两道
403045wqua
啊啊啊啊啊!真的很变态,谁会想到remove会引起土壤翻动。。。。我又没有下地真的种过田呜呜呜
ziqi
挪走D就是翻动了土壤
JackMousa
让我康康是谁没读懂题
杀鸡迫在眉睫
本题中,有多处是绕了个弯的表达,例如all dandelions were removed其实就等同于后面描述的the control plots。选项里的left unchecked,就等同于conrtol the plots/species。The presence of dandelions就是指uncontrolled plots或leave checked。Soil disturbance发生于controlled plots!
杀鸡迫在眉睫
哎,E选项的土壤干扰是需要多推理一步才能作为他因而connect上的。读这个选项时我没有意识到挪走dandelions就是动了土壤!
249482klaj
哎哎哎!读不懂就做不来
冲他丫的
AB是增强 哎。。。。
ICBA冲
一个人弄了16块土地,其中八块放本地花和外地花两种,剩下的八块只放本地花,然后发现:有两种花的那八块土地里的本地花比只有本地花的地里的本地花多,所以得出结论:外地花能促进本地花传粉和繁殖。 我们要做的是:如何证明本地花的多少跟有没有外地花帮助传粉无关,而是因为其他原因? E土壤被干扰导致花种子少了,所以长出来的花少。正确。因为all dandelions were removed from eight plots,在移除的时候干扰到了土壤,所以就长不好了。
旮旮
逻辑flaw----在l花中:有d的种子产量>没有d的种子产量,所以就推断d是导致种子产量上升的原因,显然不妥,没有考虑到其他因素,所以削弱方向----他因削弱
263016lthh
augment 看成了argument。。。。无语
Mariposa爱学习
disturbances干扰 soil disturbances土地翻动
206787q
关键点在于要理解到,控制组和实验组的区别有两点:实验组不仅移除了D,同时好造成了soil disturbances,E选项就是采用结论遗漏的第二个因素来攻击结论的
lachata啊
在科罗拉多S草甸,非本地的D和本地花L共存。黄蜂会光顾这两种植物,可能导致两物种在交叉授粉。最近的研究中,研究者选取了16个地区种两种植物。所有D从8个区移除了;余下的8个控制地区未打扰。L在控制区比除去D的地区产生了多得多的种子,于是研究者得出结论,D的存在吸引了更多授粉昆虫来到混种区,从而对本地物种的授粉(因此种子产出增强)有益 削弱题 A 黄蜂在混种区更多光顾D;说明D更吸引授粉昆虫,增强,方向反,排 B 混种区,授粉昆虫能从在两个物种间授粉,增加种子产出;增强,方向反,排 C 如果不管制,外地物种如D很快挤掉本地物种;而原文反而是L产生了更多种子,违背题干事实,排 D 种子发芽是一种比种子生产更有效的方式保证物种茁壮;无关,排 E 土壤翻动导致更少开花,因此更低的种子产出;他因削弱,正确
lachata啊回复lachata啊
发错地方了。。。。本来要记到笔记里的
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2020-10-29 00:56:07
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