超星 - Test 18 - 查题吧

单选题

In ______, the AquAdvantage salmon was approved by the US FDA for commercial production, sale and consumption, making it the first genetically modified animal to be approved for human consumption.

A. 2010
B. 2013
C. 2015
D. 2017

单选题

One of the objectives for developing plants based on GM organisms is to improve crop protection. The GM crops currently on the market are mainly aimed at an increased level of crop protection through the introduction of ____________ against plant diseases caused by insects or viruses or through increased tolerance towards herbicides.

A. sensitivity
B. resistance
C. tolerance
D. robustness

单选题

Resistance against insects is achieved by incorporating into the food plant the gene for toxin production from the bacterium Bacillus thuringiensis (Bt). This toxin is currently used as a conventional _____________ in agriculture and is safe for human consumption.

A. drug
B. antibiotics
C. insecticide
D. antkiller

单选题

Herbicide ____________ is achieved through the introduction of a gene from a bacterium conveying resistance to some herbicides. In situations where weed pressure is high, the use of such crops has resulted in a reduction in the quantity of the herbicides used.

A. sensitivity
B. tolerance
C. reactivity
D. hypersensitivity

单选题

Monsanto developed Roundup, a glyphosate-based ___________ in the 1970s, and became a major producer of genetically engineered crops.

A. drug
B. herbicide
C. insecticide
D. antikiller

单选题

In 2017, global area of biotech crops was ________ million hectares.

A. 185.8
B. 189.8
C. 191.8
D. 195.8

单选题

In2017, the areaofbiotechcrops in the US was________millionhectares.

A. 50.2
B. 60.2
C. 65.2
D. 70.0

单选题

In2017,theareaofbiotechcropsin Brazil was________millionhectares.

A. 40.2
B. 45.2
C. 50.2
D. 55.2

单选题

In2017,theareaofbiotechcropsin Argentina was________millionhectares.

A. 20.6
B. 23.6
C. 26.6
D. 30.6

单选题

In2017,theareaofbiotechcropsin Canada was________millionhectares.

A. 9.1
B. 11.1
C. 13.1
D. 16.1

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