Advertisements
Advertisements
प्रश्न
What is a GMO?
उत्तर
A genetically modified organism (GMO) is a living organism whose genes have been altered by biotechnological manipulation. Plants, bacteria, fungi, and animals are genetically modified these days.
APPEARS IN
संबंधित प्रश्न
what is golden rice.
Answer the following question:
Why do farmers find the production of hybrid seeds costly?
Maize grain is a fruit known as ______.
Bt Cotton is resistant to ______.
In RNAi genes are silenced using ______.
Discuss the advantages of GMO.
What are the various advantages of using genetically modified plants to increase the overall yield of the crop?
Insects in the Lepidopteran group lay eggs on maize crops. The larvae on hatching feed on maize leaf and tender cob. In order to arrest the spread of three such Lepidopteran pests, Bt maize crops were introduced in an experimental field.
A study was carried out to see which of the three species of lepidopteran pests was most susceptible to Bt genes and its product.
The lepidopteran pests were allowed to feed on the same Bt-maize crops grown on 5 fields (A-E).
The graph below shows the leaf area damaged by these three pests after feeding on maize leaves for five days.
Key for lepidopteran insect pest species
 |
Species I |
 |
Species II |
 |
Species III |
Insect gut pH was recorded as 10, 8 and 6 respectively for Species I, II and III respectively.
(a) Evaluate the efficacy of the Bt crop on the feeding habits of the three species of stem borer and suggest which species is least susceptible to Bt toxin.
(b) Which species is most susceptible to Bt-maize, and explain why?
(c) Using the given information, suggest why a similar effect was not seen in the three insect species.
With the help of a suitable example, explain how cry-proteins acts as a biological pesticide.
The main objective of the production of pest-resistant GM crops is to ______.
