DIVERSITY IN LIVING ORGANISMS
The nature is a boon to us. The part of earth in which Living and non-living organisms exist is called the biosphere. It contains a huge variety of species Living in it that interdepends on each other. Biosphere Biosphere The interrelationship of the species and their relationship with the environment to support Lite is called biological dtversit - This community of organism s interacting with each other and their physical environment is calle ecosystem Ecosystem
Classification and Evolution Organizing the living organisms into groups according to a certain set of characteristics is called classificatiow The features belonging to a particular organism is called characteristics. We need classification due to following reasons: It is not possible to study about each existing Living organism in details. Classifying organisms into groups makes it easier to knouw about the different life forms It helps us to understand the evolution of all life forms to a Large extent. .It also forms the basis for the giving scientific names to the living organisms in order to universalize their names so that people around the world can recognize the organism irrespective of their Local word for the organism
Organisms can be classified on the basis of their characteristics: Size: The size of the organisms. Cellularib : Whether the organism is multicellular or unicellular. Habitat: This classification is done on the basis of whether the organism Lives on land, air or water. Body organization organized in the body of organisms. : The way in which the cells are
Aristotle classified the organism on the basis of their habitat. The animals Living on land were called terrestrial animals. The animals living in water were called aquatic animals. The animals Living on air were called aerial animals. But this strategy couldnt work because the plants werent considered here. Some animals except one characteristic did not share any other characteristics in common. For example fish and octopus both are aquatic animals but except living in water they dont share any other common characteristics.
The process of development of complex organisms rom simpler one with time is called evolution,
THE HIERARCHY OF CLASSIFICATION-GROUPS Ernst Haeckel (1894), Robert Whittaker (1959) and Carl Woese (1977) classified the organisms into wider classes called kingdoms Robert Whittaker used the following points to categorize the organisms: Cell structure Body organization Mode and source of nutrition
All living organisms were broadly categorized into following5 categories called kingdoms: .Monera .Protista . Fungtj . PLantae Animalia
The structure of a kingdom is as follows: Example: ROSE Kingdom: Plantae Division: Magnoliophyta Kingdom Phylum (for animalsCass Magnoliopsida Division (for plants) Order Rosales Family: Rosaceae Genus Rosa Species Gallica Class Order Family Genu
Currently pursuing my engineeering in Biotechnology, in B.M.S college of Engineering. Dancing & Reading keeps me alive.