Hybridisation is the interbreeding between two genetically different organisms from the same or different species. When such interbreeding is between different species it is known as interspecific hybridisation. Genetically modified crops are those that are genetically engineered by introducing the genes of the desired trait (character) into the plants. When the cross is between two different varieties of the same species then it is known as intervarietal hybridisation. So, the correct options are 'Hybridisation means crossing between genetically dissimilar plants and Introducing genes of the desired character into a plant gives genetically modified crop'.