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
Which of the following statements are considered as the advantages of biotechnology?
I. Creation of fermented food
II. Production of pestresistant crops
III. Plants yielding more nutritious and tastier fruits
IV. Production of new types of medicine to fight dangerous disease
Choose the correct option
Only IV
I and III
I, II and III
I, II, III and IV
Consider the following statements
I. Specific toxin gene have been isolated from
II. toxin is coded by a gene named
III. toxin protein exists as inactive protoxins
Which of the statements given above are correct?
I, II and III
I and II
I and III
II and III
What is true about Bt toxin?
The inactive protoxin gets converted into active form in the insect gut
Bt protein exists as active toxin in the Bacillus
The activated toxin enters the ovaries of the pest to sterilize it and thus, prevent its multiplication
The concerned Bacillus has antitoxins
A researcher uses Agrobacterium tumefaciens to introduce a gene into a plant cell. Which of the following is NOT a crucial step in this process?
Infection of plant cells with the engineered Agrobacterium
Insertion of the gene of interest into the Ti plasmid
Ligation of the gene into a yeast expression vector
Regeneration of the transformed plant cells
Flavr savr variety of tomato, remains fresh for a longer period than normal tomato due to
Presence of pest resistance gene
Over expression of gene coding for enzyme polygalacturonase
Silencing of gene coding for enzyme polygalacturonase
Presence of vitamin A and C
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.
Statement I: Bt toxins are specific to certain insect groups and are encoded by the cry gene family, such as cryIAc.
Statement II: Bt toxin is initially inactive (protoxin) within Bacillus thuringiensis. Upon ingestion by an insect, the alkaline pH of the gut activates the protoxin.
Choose the correct answer:
Both Statement I and Statement II are true.
Statement I is true but Statement II is false.
Statement I is false but Statement II is true.
Both Statement I and Statement II are false.
Disadvantages of chemical agents are
I. chemicals are toxic and harmful to human beings and animals
II. chemical pollute the environment and plants
III. weedicides used to remove weeds also pollute the soil
Choose the correct option
I, II and III
I and II
I and III
II and III
The use of biofertilizers in agriculture promotes:
Increased pesticide use
Soil degradation
Sustainable agriculture
Water pollution
Study the following statements regarding Bt toxins produced by bacterium Bacillus thuringiens is and select the correct one
Some strains of Bacillus thuringiens is produce proteins that kill certain insects such as lepidopterans, coleopterans and dipterans
Bt toxin proteins do not kill the bacteria themselves because the toxin proteins occur in an inactive form called protoxins
When an insect ingests the inactive Bt toxin, it is converted to an active form of toxin due to alkaline pH of the gut which solubilises the protein toxin crystals
All of the above
