Bt cotton, widely grown in Pakistan, has been given a gene from a bacterium so that the plant can
Correct answer: A. produce a protein toxic to the insect pests that attack it
- A. produce a protein toxic to the insect pests that attack it
- B. fix nitrogen from the air
- C. survive without any water
- D. ripen its bolls faster
Explanation
The gene comes from Bacillus thuringiensis and codes for a crystal protein that kills bollworm larvae feeding on the plant, so far less insecticide has to be sprayed. The benefits are lower cost and less chemical exposure for farm workers, while the main concern is that pest populations may evolve resistance if the crop is grown continuously. Nitrogen fixation by cereals and cotton remains a research goal, not an achievement.
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