Advertisements
Advertisements
प्रश्न
A farmer grew 2 varieties of corn crops in fields A and B. He grew normal corn crops in field A and GM corn crops in field B. He observed corn borers attacked only in field A. To control it, spores of Bt were sprayed in field A.
- Name the gene in the spores responsible for the control of this pest.
- What effect will the spores of Bt have on the insect pest?
- How has field B developed resistance against this pest?
Advertisements
उत्तर
- Cry/Ab
- The spores of Bt contain a crystalline toxin, which is inactive; for this crystalline toxin protein to become active, it needs alkaline pH, which is present in the insect gut. The gut lining is broken down/mid-gut epithelial cells become porous/swollen/cell lysis.
- The Bt-toxin gene is cloned and inserted into the plant genome by recombinant DNA technology. These genetically modified (GM) plants express the Bt-toxin genes and become pest-resistant.
APPEARS IN
संबंधित प्रश्न
Name the type of association that the genus Glomus exhibits with higher plants.
Give two examples of microbial pesticides with their hosts.
Select the odd one from given herbicides.
Match the column A with B and rewrite correct pairs
| A | B | |
| I | Mycoherbicides | Cactoblastis |
| II | Bacterial herbicides | Alternaria |
| III | Insects as herbicides | Xanthomonas |
______ are controlled by the microbial herbicide Phytophthora palmivora.
Identify the reason/s due to which Trichoclerma species is a potent biocontrol agent.
Which one of the following statements is WRONG in relation to transgenic Bt cotton plant?
Which insect biocontrol agent is specifically useful for eliminating aphids?
Which of the following is an example of a smother crop?
What role does Trichoderma play in the root ecosystem?
