32. How long have we had transgenic food crops?

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Question restatement: 32. How long have we had transgenic food crops?

Option-by-option analysis:

Option 1: "50 years". This is the best-supported choice among the options. The development of transgenic (GM) crops began in the 1970s–1980s, with the first commercialized GM crop appearing in the mid-1990s. Roughly five decades ago aligns reasonably with the timeline from foundational genetic engineering work to commercialization, making ~50 years a plausible duration for having transgenic food crops.

Option 2: "500 years". This is inaccurate because genetic engineering techniques used to create transgenic crops are modern developments that did not exist 500 years ago. Agricultural crops with wild-type genetics have existed for millennia, but transgenic modification itself is a 20th–21st century capability.

Option 3: "> 5000 years". This is clearly incorrect for the same reason as above: transgenic modification is not something that began thousands of years ago; the concept of modifying genes with targeted techniques is a modern scientific advancement.

Option 4: "5 years". This underestimates the timeline dramatically. The first transgenic crops were developed and approved for commercial cultivation in the 1990s, which is about 25–30 years ago, not 5. While some lab work occurred within a few decades, 5 years would be far too short to establish multiples of crops worldwide.

Overall, the reasoning hinges on distinguishing modern genetic engineering timelines from historical agriculture. Options 2 and 3 misplace the era entirely by centuries, option 4 underestimates by a large margin, and option 1 best matches the commonly accepted timeline for when transgenic food crops have existed in agriculture.

BIOMI1100 Prelim 2 PollEv practice questions

32. How long have we had transgenic food crops?

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BIOMI1100 Prelim 2 PollEv practice questions

32. How long have we had transgenic food crops?

查看解析

登录即可查看完整答案

类似问题

30. Microbes are key to genetic engineering which of the following?

Recombinant DNA technology has which one of the following advantages?

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In what ways has simplification and polarization distorted the genetic engineering debate according to Margaret Mellon’s chapter, “Savior or Monster?”

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Complete the sentence about Genetically Modified (GM) Crops with ONE WORD only from the lecture. Due to biotechnology, GM crops (18) Answer Question 5[input] pesticides like Roundup.

​The most common traits that have been put into GMOs are _____.

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