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Pteridophtes

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  Before the flowering plants, the landscape was dominated with plants that looked like ferns for hundreds of millions of years. Pteridophytes show many characteristics of their ancestors. Unlike most other members of the  Plant Kingdom , pteridophytes don’t reproduce through seeds, they reproduce through spores instead seed. Pteridophyta Classification Pteridophyta is classified into four main classes: Psilopsida They are the most primitive. The stem is photosynthetic and dichotomously branched. Rhizoids are present. Leaves are mostly absent. The sporophyte is homosporous synangium. Examples-  Psilotum and Tmesipteris. Lycopsida They are commonly known as club moss. Well-differentiated plant body with adventitious root, stem, rhizophores and leaves. The sporophyte is homosporous or heterosporous. Examples-  Selaginella, Lycopodium. Sphenopsida Commonly known as horsetail. Well-differentiated plant body with roots arising from nodes of the underground rhizome, stem and scaly leaves. Ho
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Classification of bryophytes

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  Classification of bryophytes Bryophytes are nonvascular photosynthetic plants that shows a distinct generational heteromorphism. The gametophytic generation is well-developed, powerful, and independent. On the other hand, the sporophyte is always dependent on gametophyte. Bryophytes are mostly damp-loving terrestrial plants that thrive in shaded regions, on moist rocks, tree trunks, and other moist settings. They grow in tufts and cushions, and are responsible for the green color of the plains, forests, and mountains, particularly during the rainy season. Bryophytes can be found in both tropical and temperate climates, and flourish in humid environments. As a result, it is classed on the globe as a Metropolitan plant. They are classied into three divisions namely- Division HEPATICOPSIDA – the Liverworts Division ANTHOCEROTOPSIDA – the Hornworts Division BRYOPSIDA – the Mosses Classification of Bryophytes. Source:  PLANTSCIENCE4U Division 1: Hepaticopsida- The Liverworts The name “liv
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Classification of protozoa

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Classification of Phylum Protozoa Phylum protozoa  is a large and varied group and possess a complication in its classification. The conventional scheme followed by Hyman (1940), Hickman (1961) and Storer (1965), etc. recognizes two subphyla on the basis of organs of locomotion and 5 classes as follows: Sub Phylum A: Plasmodroma Locomotory organelles are flagella, pseudopodia, or none. Nuclei is of one kind. Class 1: Mastigophora Move by one to many flagella. Example:  Euglena . Class 2: Sarcodina Move and capture food by pseudopodia. Example:  Amoeba . Class 3: Sporozoa No locomotory organs. All parasitic. Spore-formation is common. Example:  Plasmodium . Sub Phylum B: Plasmodroma Locomotory organelles are cilia or sucking tentacles. Nuclei of two kinds. Class 4: Ciliate Move by cilia. Example:  Paramecium . <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4524206540672702"      crossorigin="anonymous"></scrip
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