注册领资料
While many people think of genetic manipulation of food crops as being aimed at developing larger and larger plant varieties, some plant breeders have in fact concentrated on discovering or producing dwarf varieties, which are roughly half as tall as normal varieties.
Which of the following would, if true, most help to explain the strategy of the plant breeders referred to above?
A
Plant varieties used as food by some are used as ornamentals by others.
B
The wholesale prices of a given crop decrease as the supply of it increases.
C
Crops once produced exclusively for human consumption are often now used for animal feed.
D
Short plants are less vulnerable to strong wind and heavy rains.
E
Nations with large industrial sectors tend to consume more processed grains.
申友解析
题干:当大家都在使用基因控制技术去培植更大型的作物时,一些作物培植者却专注在培育更小型的物种上。
题目:解释后者的策略
分析:引入他因型的正向逻辑,解释后者为何反其道而行之必然要考虑到小型物种的优势。
A,一些作物被另一些人当做观赏植物。完全无关的属性!
B,供应量增加批发价降低,一样是无关属性。
C,曾经给人吃的作物现在拿来养动物,无关属性again!
D,矮小植物更能适应强风和大雨,正确!
E,更大程度上工业化的国家更倾向于消费处理过的作物。无关属性!
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