Diversity in Living Organisms Class 9 Notes - Description
Greetings to all, Here We have provided Diversity in Living Organisms Class 9 Notes PDF to assist you all. Science Chapter 7 this CBSE note contains CBSE Key Notes, CBSE Revision Notes, Short Key Notes of the complete Chapter 7 titled Diversity in Living Organisms of Science taught in class 9. If you are a student of class 9 who is utilizing the NCERT book to study Science, then you must reach across Chapter 7 Diversity in Living Organisms. After you have learned the lesson, you must be skimming for notes to remember. Here you can get full chapter 7 Diversity in Living Organisms Class 9 notes in one place. For a better familiarity with this chapter, you should also see NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms.
CBSE Class 9 Science Notes Chapter 7 Diversity in Living Organisms Pdf download is part of Class 9 Science Notes for Quick Revision. we have given NCERT Class 9 Science Notes Chapter 7 Diversity in Living Organisms at the end of this editorial.
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Diversity in Living Organisms Class 9 Notes PDF –
Introduction to Taxonomy
- Diversity is the presence of different organisms in the same ecosystem or geographical location.
- Diversity gives a chance for a more balanced ecosystem.
- Evolution is the slow process by which the organisms change according to their needs to survive the environment around them.
- Evolution leads to the formation of new organisms and more diversity in the ecosystem.
- Charles Darwin was an English biologist and a naturalist.
- He travelled on HMS Beagle to Galapagos Island in South America.
- Using his observation, he proposed the theory of evolution in his book On the Origin of Species.
Taxonomy is the branch of science that deals with the classification of organisms.
Hierarchy of Classification
- Organisms are arranged into groups/levels according to their similarities.
- As we go up the hierarchy, the organisms have a lesser similarity.
- A kingdom is the highest level of classification which consists of a number of phyla or divisions (in the case of plants) with similar characteristics.
- Phylum/Division is a level of classification which consists of a number of classes with similar characteristics.
- A class is the level of classification which consists of a number of orders with similar characteristics.
- An order is the level of classification which consists of a number of families with similar characteristics.
- A family is the level of classification which consists of a number of Genus with similar characteristics.
- Genus is the level of classification which consists of a number of species with similar characteristics.
- Species is the level of classification that consists of a number of organisms with similar characteristics and can interbreed to give rise to fertile offspring.
Hierarchy of Classification
- Carolus Linnaeus is a Swedish botanist and physician who is also called the ‘Father of taxonomy‘.
- He introduced the Binomial nomenclature and laid the ground rules which paved way for modern taxonomy.
- Binomial Nomenclature was introduced by Linnaeus as a method of naming organisms in taxonomy.
- It consists of two parts.
- The first part is the Genus name which is written in capital.
- The second part is the species name, which is not capitalized.
Five Kingdom Classification
5 Kingdom classification
- 5 Kingdom classification is the most accepted system of classification given by R.H.Whittaker.
- This classification solved most of the issues in taxonomy related to the placement of bacteria and fungi.
- The 5 kingdoms are Monera, Protista, Fungi, Plantae, and Animalia.
- All the prokaryotic organisms are placed in this Kingdom.
- Bacteria and their ancient cousin, archaebacteria are the organisms that make up Kingdom Monera.
- These are prokaryotic, unicellular, autotrophic/heterotrophic organisms.
- Bacteria have a cell wall made up of polysaccharides.
- The category in the kingdom Monera consists of the organisms surviving in extremely hot conditions.
- They are considered to be the most ancient living organisms present on the planet.
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