The most likely reason for the development of resistance against pesticides in insect damaging a crop is
The pesticide causes mutations in the insects that make them resistant.
Some insects have genes that make them resistant to the pesticide, and these genes are passed on to their offspring.
The insects learn to avoid areas where the pesticide has been applied.
The pesticide strengthens the insects' immune systems, making them resistant.
Related Questions
Genetic modification has?
Made crops more tolerant to abiotic stresses
Reduced reliance on chemical pesticides
Helped to reduce post-harvest losses
All of these
Golden rice β a transgenic variety of rice is principally richer than normal rice in?
Cry I AB
Hirudin
TPA
carotene
Genetic diversity in agricultural crops is threatened by
Introduction of high yielding varieties
Intensive use of fertilizers
Extensive intercropping
Intensive use of biopesticides
Which technique is LEAST suitable for introducing a foreign gene into a mature plant cell with a thick cell wall?
Biolistics
Agrobacterium-mediated transformation
Microinjection
Heat shock transformation
Which is a bioinsecticide?
Cactoblastis cactorum
Anabaena
Bacillus thuringiensis
Rhizobium
A plant species which has been exploited for the production of hirudin is
Brassica napus
Zea mays
Solanun nigrum
Oryza sativa
A farmer uses a biopesticide containing Bacillus thuringiensis to control a pest insect. Which of the following best describes the fate of the Bt toxin after it is ingested by the insect?
It remains inactive in the gut and is excreted.
It is activated in the alkaline gut and binds to receptors, causing cell death.
It is deactivated by gut enzymes and has no effect.
It stimulates the insect's immune system, providing resistance.
Cry protein is obtained from
Protozoa
Bacteria
Fungi
Algae
The vector for T-DNA is
Thermos aquaticus
Salmonella typhimurium
Agrobacterium tumefaciens
Escherichia coli
Transposons are known as?
Jumping genes
Mobile genetic element
Non mobile genetic elements
Both 1 and 2
