There are of the following types: unicellular (Golenkinia), filamentous (Microthamnion), siphonous, multicellular, colonial (Volvox), parenchymatous (Coleochaete), motile, and non-motile. They have membrane-bound chloroplasts and nuclei. -Unicellular, colonial or multicellular in organization-Volvox can form a colony-Flagellated cells arranged in a single layer forming a hollow, ball shaped structure (colony) the cells are connected by strands of cytoplasm + flagella face outwards then beat together, spinning the colony through water. Chlorophyta, the green algae, is one of the largest algal phyla and one of the most diverse, from common pond scum to the bright green sea weeds. There are about 8,000 species of green algae.

Chlorophyta, the green algae, is one of the largest algal phyla and one of the most diverse, from common pond scum to the bright green sea weeds. spirogyra is unicellular because it is an example of green algae or chlorophyta, which is a unicellular organism: ... have both multicellular and unicellular forms. The Chlorophyta includes unicellular, colonial, multicellular and coenocytic green algae. The various species can be unicellular, multicellular, coenocytic (having more than one nucleus in a cell), or colonial. Multicellular organisms need specialised organ systems, whereas all the life processes in a unicellular organism take place in that one cell.Multicellular organisms need organ systems to carry out functions such as: Communication between cells, eg the nervous system and circulatory system. A one-billion-year-old multicellular chlorophyte. Unicellular Chlorophyta is one class of algae whose cells are eukaryotes … ... unicellular). stage at the apical end of filamen ts where akinetes or zoospores are . iv. Algae may be unicellular, colonial, filamentous, or multicellular; Unicellular algae are single-celled & make up phytoplankton (a population of photosynthetic organisms that begins many aquatic food chains) Phytoplankton make much world’s carbohydrates & are the major producers of oxygen

The green lineage of chlorophyte algae and streptophytes form a large and diverse clade with multiple independent transitions to produce multicellular and/or macroscopically complex organization. [11] Septation in V aucheria occurs only in the reproductive . The green algae include unicellular and colonial flagellates, most with two flagella per cell, as well as various colonial, coccoid and filamentous forms, and macroscopic, multicellular seaweeds. The 7000 species of green algae range from microscopic single cells, long strings and filaments, flat plants (the common sea lettuce) and even hollow tubes to some multicellular organisms reaching 25 ft long. [10] Algae produce H 2 gas under anaerobic conditions by providing hydrogenases with hydrogen ions derived from splitting of water molecules via photosynthesis. Those that are motile have two apical or subapical flagella. Chlorophyta (klōrŏf`ətə), phylum (division) of the kingdom Protista Protista or Protoctista, in the five-kingdom system of classification, a kingdom comprising a variety of unicellular and some simple multinuclear and multicellular eukaryotic organisms. The chlorophytes usually live in water, but some species inhabit on land (soil, bark etc. 2.Describe and give examples of two separate paths by which multicellular organisms evolved from unicellular organisms. Algal-Like Protists Characteristics of Algae: Plantlike members of the kingdom Protista Eukaryotes Most unicellular, but some multicellular Autotrophic – contain chlorophyll & make food by photosynthesis Plankton = communities of organisms, mostly microscopic, that drift passively or swim weakly near the surface of oceans, … There are many different species belonging to Chlorophyta; some are unicellular, some are multicelluar. Green algae or Chlorophyta are the green color algae in both freshwater and marine habitats.

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