This presentation contents information about environment of Earth,Types of things present on Earth, Characteristics of living , what biodiversity is and Why Biodiversity is necessary. Furthermore it contains information about Taxonomic system, Kingdom and factors of classification.
2. CONTENT
•Define environment of earth
•Types of things
•Characteristics of living
•Biodiversity
•Why Biodiversity
•Taxonomic system
•Kingdom
•Factors of classification
9. BIODIVERSITY
• EARTH IS OCCUPIED BY DIVERSE KINDS OF LIVING ORGANISMS
• THEY LIVE IN VARIOUS ENVIRONMENTS.
• THE WORLD IS ESTIMATED TO HAVE 5 TO 30 MILLION SPECIES OF LIVING ORGANISMS.
• THUS THE EXISTENCE OF DIFFERENT FORMS OF A SPECIES OR GENUS AND DIVERSE
ADAPTATIONS FOR, VARIED SURROUNDINGS ARE REFERRED TO AS “BIODIVERSITY”.
14. TAXONOMIC SYSTEMS
•Carl Linnaeus (1707 - 1778) the father of taxonomy.
•Binomial nomenclature for all species of animals and plants.
•Binomial nomenclature is a formal system of naming species of living things
• The highest rank was given the name "kingdom"
•Followed by four other main or principal ranks: the class, order, genus and species.
•Later two further main ranks were introduced, making the sequence kingdom, phylum or
division, class, order, family, genus and species.
16. FACTORS OF CLASSIFICATION
•Structure of cells - {prokaryotic or eukaryotic }
•Structure of organism - {unicellular or multicellular}
•Mode of nutrition - photosynthesis in green plants,
absorption in fungi and ingestion in animals.
17.
18.
19.
20. LETS DISCOVER LIVING ORGANISM
• HTTP://CMAPSPUBLIC.IHMC.US/RID=1JFH8VCSV-1N1JNNS-
18RS/CLASSIFYING%20LIVING%20ORGANISMS.CMAP
He emphasized that animals can be classified according to their way of living, actions, habits and body parts.
The term taxonomy is a Greek word. Its components are taxis and
nomos. While taxis means arrangement, nomos means law. Thus taxonomy
is defined as the “theory and practice of classifying organisms”
He used simple morphological characters to classify plants into trees, shrubs and herbs. He also divided animals into two groups, those which had red blood and those that did not.
This system was used till very recently. This system did not distinguish between the eukaryotes and prokaryotes, unicellular and multicellular organisms and photosynthetic (green algae) and non-photosynthetic (fungi) organisms. Classification of organisms into plants and animals was easily done and was easy to understand, inspite, a large number of organisms did not fall into either category.
In the Whittaker system, Plantae included some algae. In other systems (e.g., Margulis system), Plantae included just the land plants (Embryophyta).