Explanation:Gregor Johann Mendels TheoryMendel used a number of contrasting visible characters of garden peas- round/wrinkled seeds, tall/short plants, white/violet flowers, and so on.He took pea plants with different characteristics- a tall plant and a short plant, produced progeny from them and calculated the percentages of tall or short progeny.Hence, we conclude that ?Gregor Johann Mendel? had done experiments to know the inherited properties of parents on ?pea plant.Additional InformationDarwin TheoryDarwin gave the theory of natural selection.Each species reproduces to maintain its race.The species struggle for survival with changing environmental conditions.MS SwaminathanHe was a geneticist.He is remembered as he had introduced a high-yielding variety of wheat.Book "The Quest for a World Without Hunger" was released by Prime Minister Narendra Modi on MS Swaminathan. Green Revolution made the country self-reliant in foodgrain production. Post Green Revolution, there is an increase in the use of chemical fertilizers and irrigation water to meet the nutrients and water demand respectively, of high yielding varieties (HYVs) of crops.