Euthenics is defined as the science of improving the internal well-being of the human by improving the external factor of their environment. An example of euthenics is someone learning about effective nutrition.
In antisense technology you will have to provide antisense strand because sense strand is present in plant while sense strand is already in plant.. The target gene will be silence when sense and antisense paired together. In case of RNAi, both sense and antisense are provided, which generate small RNAs whch cut mRNA into pieces and thus information is prevented from translation