Question

High yielding varieties of GM crops.​

Answer 1

Explanation:

High-yielding varieties are found naturally less resistant to pests in comparison with their progenitors. Each year, insects destroy about 25% of food crops worldwide. The introduction of plant monocultures and indiscriminate and widespread application of chemical pesticides resulted in an insurgence of pests, development of resistance, and occurrence of residual toxicity. To overcome these problems, development of resistant crop varieties through a transgenic approach will contribute to a reduction in pest attack and decrease the use of chemical insecticides.

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Answer 2

Answer:

High-yielding varieties are found naturally less resistant to pests in comparison with their progenitors. Each year, insects destroy about 25% of food crops worldwide. The introduction of plant monocultures and indiscriminate and widespread application of chemical pesticides resulted in an insurgence of pests, development of resistance, and occurrence of residual toxicity. To overcome these problems, development of resistant crop varieties through a transgenic approach will contribute to a reduction in pest attack and decrease the use of chemical insecticides (Slater et al., 2003).

Explanation:

The major high-yielding crops, in terms of land devoted to their culture and the total amount of produce, are wheat, corn, soybeans, rice, potatoes, and cotton. Each of these crops originated from a low-yielding native plant that was gradually converted into one of the highest-yielding plants in the world.