Biology Multiple Choice Questions and Answers for Different Competitive Exams by Ralph Bock, Volker Knoop. 5. Related WordsSynonymsLegend: Switch to new thesaurus Noun 1. Description of Rhodophyceae (Red Algae): It is a large group of algae consisting of about 831 genera and over 5;250 species. ADVERTISEMENTS: In this article we will discuss about:- 1. Characteristics of Rhodophyceae 3. The sporangium is the structures in which spores are formed. Plus, get practice tests, quizzes, and personalized coaching to help you succeed. Read More: Sporulation. Plants are mainly multicellular organisms, predominantly photosynthetic eukaryotes of the kingdom Plantae.Historically, plants were treated as one of two kingdoms including all living things that were not animals, and all algae and fungi were treated as plants. red algae (marine algae in which the chlorophyll is masked by a red or purplish pigment; source of agar and carrageenan) Polysiphonia is the model organism for Rhodophyta. The character and relative extent of the two phases vary greatly among different groups of plants and algae. Rhodophyta members of the Thallophyta division Rhodophyta, in which the chlorophyll is masked by PHYCOERYTHRIN.Rhodophytes vary from filamentous forms to those with an extensive thallus, and have gametes that are nonmotile. The gametophytes of Polysiphonia are isomorphic (iso- meaning same, morph- meaning form), meaning they … Primitive group of plants,body thallus type, do not divided into root,stem or leaves.thallus structure unicellular or multicellular. ‘Introns occur frequently within the Chlorophyta, but within the Rhodophyta, Bangia, Porphyra, and Hildenbrandia are the only genera currently known to contain introns.’ ‘As mentioned, the clade Plantae is a bit more inclusive and also includes Rhodophyta and certain ‘green algae’ which are treated in the Eukarya section.’ However, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria). Click on a title to look inside that book (if available): Genomics of Chloroplasts and Mitochondria (2012). A pteridophyte is a vascular plant (with xylem and phloem) that disperses spores.Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. They are usually homosporous (meaning: one type of spore is produced) and are also heterosporous, (meaning: two kinds of spores are produced.) During the course of evolution, the sporophyte stage has become progressively increased.Thus, in the higher (i.e., vascular) plants the sporophyte is the dominant phase in the life cycle, whereas in the more primitive nonvascular plants the gametophyte remains dominant. As a member, you'll also get unlimited access to over 83,000 lessons in math, English, science, history, and more. Classification. They are commonly known as red algae due to the presence of a water soluble red […] Red algae have an alternation of generations life cycle that has an extra diploid stage: the carposporophyte. 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