Which of the following statements are incorrect?
(i) In green revolution increased yields have partly been due to the use of improved crop varieties.
(ii) In green revolution increased yields mainly due to the use of better crop management practices and use of agrochemicals likes fertilizers and pesticides.
(iii) Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called Genetically Modified Organisms (GMO).
(iv) Bt toxin is produced by a bacterium called Bacillus thuringiensis created a bio-pesticide.
(v) Bt cotton, Bt corn, rice, tomato, potato and soyabean are GM plant which have Bt toxin gene.
(vi) Some strains of Bacillus thuringiensis produce proteins that kill all form of insects
Text Solution
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Let's check the statements:
(i) Correct - Green Revolution increased yields partly due to improved crop varieties.
(ii) Correct - Better crop management and agrochemicals (fertilizers, pesticides) also contributed significantly.
(iii) Correct - Organisms with altered genes are called GMOs.
(iv) Correct - Bacillus thuringiensis produces Bt toxin, used as a biopesticide.
(v) Correct - Bt genes have been introduced into crops such as cotton, corn, rice, tomato, potato, and soybean.
(vi) Incorrect - Bt toxins are insect-group specific; they do not kill all forms of insects.
Therefore, statements (i), (ii), (iii), (iv), and (v) are correct, and only (vi) is incorrect.
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