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Plasmogamy occurs, Reproduction in Fungi ”Biological Classification” Botany Notes Chapter 2, for Class 12-CBSE

Plasmogamy occurs by the following methods : a) Planogametic copulation/ Gametic fusion : This is the simplest form of sexual reproduction. In this process, fusion of two gametes of opposite sex or strains takes place. One or both of the fusing gametes are motile. It results in the formation of a diploid zygote, e.g., Allomyces. b) Gametangial contact : In this process two gametangia come in contact with one another....
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Botany Notes “Bacterial Cell Structure-Biological Classification” Chapter 2, for Class 12-CBSE

Bacterial Cell Structure Bacterial cell structure is very simple although they are very complex in behavior. They show the most extensive metabolic diversity. Electron microscope can only reveal the detailed structure of bacterial cell. It consists of following structures : 1.Glycocalyx : It is outermost part of cell envelope (Glycocalyx , cell wall, plasma membrane ) Represented by either slime layer or capsule Slime layer is composed of dextran, dextrin...
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Botany Notes “Eubacteria-Biological Classification” Chapter 2, for Class 12-CBSE

Eubacteria Bacteria are cosmopolitan and occur in every habitat wherever living or dead organic matter is present. Anton von Leeuwenhoek  discovered bacteria in rain water which had been allowed to stand for many days and tartar scrapped from teeth. In 1695, he published his work “The Secrets of Nature”. A.V. Leeuwenhoek termed these microorganisms as dierkens which was later translated as animalcules by the Royal society. Term microbe for animalcules...
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Botany Notes “Important Questions of Biological Classification” Chapter 2, for Class 12-CBSE

Position of bacteria in a kingdom system of classification proposed by Linnaeus is Monera Protista Plantae Mychota Position of bacteria in a kingdom system of classification proposed by Linnaeus is Monera Protista Plantae Mychota In three kingdom classification, the kingdom Protista includes Unicellular eukaryotic organisms only Unicellular prokaryotic organisms only Wide variety of unicellular, mostly terrestrial Prokaryotes Wide variety of Unicellular, mostly aquatic eukaryotes Which of the following was given...
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Botany Notes “Kingdom Monera” Biological Classification-Botany Chapter 2, for Class 12-CBSE

Kingdom :  Monera The Kingdom Monera includes all prokaryotes. Monerans are the most primitive forms of life, originating from more ancient living stock termed progenote. The kingdom Monera includes eubacteria and archaebacteria. Eubacteria includes Cyanobacteria. Actinomycetes,  Mycoplasma,  Rickettsiae, Chlamydiae and Spirochaetes etc. Classification of Monera 1.In 4 kingdom system , a new kingdom was created to accommodate all prokaryotic organisms i.e, eubacteria and archaebacteria. Copeland called it kingdom Mycnota. It...
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Botany Notes “”Kingdom Systems of Classification” Biological Classification” Botany Chapter 2, for Class 12-CBSE

Kingdom Systems of Classification 1.Two Kingdom Classification : It was given by Linnaeus. Traditionally all the organisms of the world were divided into two kingdoms- the animal kingdom (Animalia) and the plant kingdom (Plantae). The major criterion of classification  was the presence or absence of cell wall. Other criteria’s were locomotion, mode of nutrition, response to external stimuli etc.  Shortcomings of two –kingdom system of classification : Two- kingdom system...
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Botany Notes “Introduction of Biological Classification” Botany Chapter 2, for Class 12-CBSE

Introduction The purpose of biological classification is to organize the vast number of known plants and animals into categories that could be named and easily remembered and studied. As a result, the study of one organism of a group gives us the idea about the rest of the  member of that particular group. Related posts: Botany Notes “Biodiversity” for Class 12-CBSE Botany Notes “Need for classification, What is Living” for...
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Botany Notes “Important Questions of What is Living” Chapter 1, for Class 12-CBSE

Which one of the following group of taxa does not represent similar category in hierarchy? Potato, brinjal and tomato Tiger, lion and leopard Wheat, monocots and angiosperms Wheat, rice and mango Which one of the following obligate category in taxonomic hierarchy will have maximum number of common characters? Family Class Order Species Select incorrect match w.r.t. mango Family – Anacardiaceae Order – Sapindaceae Class – Dicotyledonae Division – Angiospermae Select...
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