1. Discuss how classification systems have undergone several changes over a
period of time?
of
Answers
Answer:
Explanation:
The classification systems have undergone several changes with time. The first attempt of classification was made by Aristotle. He classified plants as herbs, shrubs, and trees. Animals, on the other hand, were classified on the basis of presence or absence of red blood cells. This system of classification failed to classify all the known organisms.
Therefore, Linnaeus gave a two kingdom system of classification. It consists of kingdom Plantae and kingdom Animalia. However, this system did not differentiate between unicellular and multicellular organisms and between eukaryotes and prokaryotes. Therefore, there were large numbers of organisms that could not be classified under the two kingdoms.
Answer:
The classification systems keep on changing as the new species are found and classified. Till now, the classification system has undergone several changes. The first-ever classification was given by Aristotle who divided plants into herbs, shrubs and trees based on their habit and animals based on presence or absence of red blood. Later on, this classification system was rejected because it was misleading. Linnaeus then classified all organisms into two large kingdoms i.e. plants and animals. Since, this system could not distinguish between eukaryotes or prokaryotes, unicellular or multicellular organisms, it was rejected. Further, three kingdom and four-kingdom classification were proposed by Earnst Haeckel and Copeland respectively. These were soon replaced by five kingdom classification by R.H Whittaker. In this system, organisms were divided into five kingdoms namely monera, protista, fungi, plantae and animalia. Even this classification system was not up to the mark, so corrections are being made in this. Thus, we can conclude that classification systems have undergone several changes over a period of time.