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Acetabularia is a genus of green algae in the family Polyphysaceae. [4] Typically found in subtropical waters, Acetabularia is a single-celled organism, but gigantic in size and complex in form, making it an excellent model organism for studying cell biology . [ 5 ]
Life cycle of Acetabularia acetabulum. This alga adheres to the substrate with rhizoids (root-like processes), and these are the only part of the alga present in the winter. The thallus consists of a single cell, and in the spring a slender stem develops from the holdfast, growing vertically to a length of about 5 cm (2 in). Growth is ...
Acetabularia caliculus, the umbrella alga, is a species of green alga found in shallow temperate and tropical seas. It usually grows on pebbles, shells or pieces of rock, and is often found in seagrass meadows , on mudflats and coral reefs , in estuaries and growing on the submerged roots of mangroves .
Acetabularia crenulata, one of the many species known as mermaid's wineglass, is a form of green alga generally found in shallow tropical seas. It can be found growing in great abundance along stretches of the overseas highway to Key West, Florida bordering on Florida Bay .
Valonia ventricosa, an alga of the class Chlorophyceae, can reach a diameter of 1 to 4 cm (0.4 to 2 in) [58] [59] Acetabularia, algae; Caulerpa, algae, [60] [unreliable source?] may grow to 3 metres long [61] Gromia sphaerica, amoeba, 5 to 38 mm (0.2 to 1 in) [61] Thiomargarita magnifica is the largest bacterium, reaching a length of up to 20 mm
Marine algae can be divided into six groups: green, red and brown algae, euglenophytes, dinoflagellates and diatoms. Dinoflagellates and diatoms are important components of marine algae and have their own sections below. Euglenophytes are a phylum of unicellular flagellates with only a few marine members. Not all algae are microscopic.
Tip growth occurs in algae (e.g., Acetabularia acetabulum), fungi and plants (e.g. root hairs and pollen tubes). Tip growth is a process that has many similarities in diverse walled cells such as pollen tubes, root hairs, and hyphae.
The Ulvophyceae or ulvophytes are a class of green algae, [3] distinguished mainly on the basis of ultrastructural morphology, life cycle and molecular phylogenetic data. [4] The sea lettuce, Ulva, belongs here. Other well-known members include Caulerpa, Codium, Acetabularia, Cladophora, Trentepohlia and Monostroma.