A) Spraying ethephon
B) Genetic engineering
C) Polyploidy breeding
D) Tissue culture
Correct Answer: D
Solution :
Plant tissue culture is the technique of in vitro maintaining and growing plant cells, tissue or organ aseptically on artificial medium insuitable container under controlled conditions. - Genetic engineering is the use of engineering technology for the improvement of genotype of organism. Transgenic crops are produced by this method. - The phenomenon of having one or more genomes in addition to normal number for a species is called polyploidy. It is used for the improvement of crops.
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