History of classification Aristotle, the Greek philosopher, classified animals based on whether they live on land, in water or in the air. Charles Darwin put forward the idea of evolution in 1859, in his book, The Origin of Species. Ernst Haeckel, Robert Whittaker and Carl Woese have tried to classify living organisms into broad categories, called kingdoms. Carolus Linnaeus classified all the living organisms into two kingdoms namely, Plantae and Animalia. Robert Whittaker, in 1969 proposed Five kingdom classification of living organisms. 02 DEFINITION Moneran characteristics of bacteria Habitat - Monerans are found everywhere in hot springs, under ice, in deep ocean floor, in deserts and on or inside the body of plants and animals. Nutrition - Autotrophs, heterotrophs, parasitic, symbiotic, commensalism, mutualism. Respiration in these organisms vary, they may be obligate aerobes, obligate anaerobes and facultative anaerobes. Circul...
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