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प्रश्न
Answer the following question.
List any four ways by which GMOs have been useful for enhanced crop output.
उत्तर
The four ways by which GMO's have been useful for enhanced crop output are -
- Genetically modified crops are more tolerant to abiotic stress, which can be in the form of cold, drought, heat or salt.
- Crops that are made pest-resistant through genetic modification have reduced dependence on chemical pesticides.
- Genetic modification of crops has reduced post-harvest losses.
- Genetic modification has helped in increasing the efficiency of mineral usage by plants. It has helped in maintaining the fertility of the soil for a longer duration.
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संबंधित प्रश्न
How did the process of RNA interference help to control the nematode from infecting the roots of tobacco plants?
What is a GMO?
Why do lepidopterans die when they feed on Bt cotton plant? Explain how does it happen.
How has the use of Agrobacterium as vectors helped in controlling Meloidegyne incognitia infestation in tobacco plants? Explain in correct sequence.
GM crops especially Bt crops are known to have higher resistance to pest attacks. To substantiate this an experimental study was conducted in 4 different farmlands growing Bt and non Bt-Cotton crops. The farm lands had the same dimensions, fertility and were under similar climatic conditions. The histogram below shows the usage of pesticides on Bt crops and non-Bt crops in these farm lands.
- Which of the above 4 farm lands has successfully applied the concepts of Biotechnology to show better management practices and use of agrochemicals? If you had to cultivate, which crop would you prefer (Bt or Non- Bt) and why?
- Cotton Bollworms were introduced in another experimental study on the above farm lands wherein no pesticide was used. Explain what effect would a Bt and Non Bt crop have on the pest.
Bt cotton is not ______.
Explain with the help of one example how genetically modified plants can:
- Reduce usage of chemical pesticides
- Enhance nutritional value of food crops
On spraying Bacillus thuringiensis on an infected cotton crop field the pests are killed by the toxin, however the toxin although produced by the bacteria does not affect it. Explain giving reason.
State any two benefits of Genetically modified crops.
Compare and contrast the disadvantages of production of genetically modified crops.
