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Thallophyta ( plant kingdom ) , plantae: classification

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Thallophyta These are the plants with no body differentiation They do have a specific root, stem, leaves so they do not have specific differentiation   They prefer aquatic habitats examples :-green algae In thallophyta they have a hidden reproductive system -cryptogamae Algae They are autotrophic  Habitat :- Mostly aquatic (freshwater/ marine )  , found in most soil/ wood  Structure :- It can be unicellular,colonial, filamanteous  Examples :-volvox ( colonial ), Chlamydomonas (unicellular ), Ulothrix (filamenteous ), Spirogyra ( filamenteous ), Ulva, Cladophora (branched filaments) it is also known as river weed Algae reproduction  Asexual reproduction :- Fragmentation Parent organism will break into new pieces or multiple pieces on maturity, each of which give rise to a new individual. Example :- spirogyra when it  becomes matures it breaks into new pieces and each of these pieces are able to give rise to a new organism altogether. Fission  
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plant kingdom

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P LA NT  KINGDOM Plantae : characterstics Eukaryotes :-specific membrane bound cell organelle & distinct nucleus  Multicellular :- they are  made up of multiple cells  Autotrophic :- prepare their own food  Immobile  They can be aquatic or land plants  Their cell walls are present Classification system  Artificial Natural Phylogenetic Artificial classification system   External morphological characters  Advantages :-closely related species could be classified  Limitations :- Equal weightage to vegetative and sexual characterstics Natural classification system  External as well as internal characters are the basis of classification Advantages :-overshadows limitations of artificial system                        Establishes relationship between organism  Limitations :-closely related organism can differ in important properties  Phylogenetic classification system  Evolutionary relationships between organisms are the basis of classification
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Biological classification

Biological classification Topics Introduction 2-kingdom classification whittaker 5-kingdom classification kingdom monera  Archaebacteria Eubacteria Mycoplasma kingdom protista chrosophytes Dianoflagellates Euglenoids Slime moulds Protozoans Kingdom fungi Phycomycetes Ascomycetes Basidiomycetes Deuteromycetes Viruses,viroids &lichens Introduction classification of living organism classifying living organism into groups based on their certain  set of characteristics (characteristics is a feature or a quality belonging to a particular  organism) Aristotle's attempt to classify living organism. He classified organisms based on habitats Land (terrestrial) -cat, dogs,human beings water(aquatic )-fish,shark,octopus Air(aerial )-bat,crow etc. He classified plants also; Herbs Shrubs Trees But then this type of classification is not very effective,because it was seen that even though there were several
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