(f) Zoospore formation occurs. The Chlorophyceae are one of the classes of green algae, distinguished mainly on the basis of ultrastructural morphology.For example, the chlorophycean CW clade, and chlorophycean DO clade, are defined by the arrangement of their flagella.Members of the CW clade have flagella that are displaced in a "clockwise" (CW, 1–7 o'clock) direction e.g. The dominant green pigments are chlorophyll a and b. gametic union takes place between morphologically identical flagellate or non-flagellate gametes. the plant body is not differentiated into root, stem and leaf. chlorophyll a and b. Blue-greens are not true algae. Algae are chlorophyll-bearing, simple, thalloid, autotrophic and largely aquatic (both freshwater and marine) organisms. The unicellular forms may be non-motile or motile by flagella. Algae (Plant Kingdom) Part-1 General Features | English Medium Biology by Dr. N.S. they grow attached to rocks. The liberation of zoos­pores usually takes place by the formation of a pore in the wall of the mother cell, or by the breaking or gelatinization of the sporan­gial wall. Because they require the basic environmental conditions, this bacteria can be found in a variety of environments ranging from marine to terrestrial habitats. Thallus Organisation of Chlorophyceae (Green Algae): The class Chlorophyceae shows a range of variation in the structure of plant body (thallus). Salient Characteristic Features of Gymnosperms All gymnospermic plants are terrestrial and most of them are tall, woody, perennial, evergreen trees or shrubs and very few are climbers. When the cells are flagellate, as in the uni­cellular and some of the colonial forms, there are usually two small contractile vacuoles near the base of the flagella. They are inhabitants of damp terres­trial places or are entirely aquatic in nature. Differentiate between green algae, brown algae and red algae in respect of pigments and reserve food material. And also comprised of numerous xanthophylls molecules that are yellowish or brownish pigments. Chlorella and chlamydo monas. Red algae (Rhodophyceae) Phycoerthirin : Floridian starch: Polysiphonia ← Prev Question. Share Your Word File The largest algae which grow about 60m in length are called kelps eg. 1.1. Thallus well-differentiated into nodes and internodes; internodes sometimes corticated; branches of limited growth in whorls; chloroplasts numerous and discoid; cells usually uninucleate; reproduction vegetative and sexual with elaborate oogonia and antheridia; germination of zygote indirect; fresh water and brackish water. i.e. There are approximately 350 genera and … The sexual reproduction in Chlorophyceae ranges in complexity from the simplest to the most complex sex structures. Linnaeus (1754) first coined the term algae, which he placed along with Liverworts & lichen under class Cryptogamia of Conventional Plant-Kingdom. Gymnosperms (gymnos – naked, sperma = seed) are naked – seeded plants. ... Salient Features and Characteristics; In such cases, gametes derived from a single parent plant unite in pairs. 3) What are sea weeds? Salient features • The members of this group are prokaryotes and lack motile reproductive structures. Carotenoids (3). Algae are ubiquitous in nature,they are found in the sea, in freshwater andmay be found everywhere in moist conditions. Answer: Variation among the shape of the chloroplast is found in members of algae. Found in different shapes and sizes ranging right from microscopic ones to visibly large ones, there are more than 8000 species of Green Algae that has been identified. The kingdom Plantae includes algae, bryophytes, pteridophytes, gymnosperms and angiosperms. • The thallus is unicellular in Chroococcus, Colonial in Gloeocapsa and filamentous trichome in Nostoc. Make a list of the salient features of brown algae. The term Algae (L. alga- sea weed) is collectively used for all the Chlorophyll bearing non­vascular thalloid organisms. A few species are internal parasites on land plants, or may occur as epiphytes upon land animals. Cyanobacteria is also composed of a wide variety of bacteria species of different shapes are sizes that can be found in different habitats in the environment. Charophyceae are a class within the Streptophyta. General Characters of Chlorophyceae (Green Algae): The members of this group are found both in fresh and salt waters. Their color is determined by the amounts of other pigmentation, including beta-carotene … F.E. What is the significance of transpiration? Algae are photosynthetic microorganisms that perform photosynthesis and produce oxygen (O2) and consume carbon dioxide (CO2) from the atmosphere. They are usually of equal length. 4) What are kelps? Cyanobacteria or blue-green algae are present in large amount on land and water. Answer: This is the earliest system of classification in plants. Shape of chloroplast differs. The gametophyte is conspicuous, long lived phase of the life cycle. Salient Features of Chlorophyceae (Green Algae): The Chlorophyceae or the green algae are characterized in having grassgreen-coloured chloroplasts containing the photosynthetic pigments, chlorophyll a, chloro­phyll b, carotenes and xanthophylls of which the first two predominate over the others. Asexual reproduction usually takes place by the production of spores within metamorphosed vegetative cells. The plant body does not show differentiation into tissue systems. 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