Write the name and class of alga in which cap cells are found
Answers
“Phylum” and “division” represent the same level of organization; the former is the zoological term, the latter is the botanical term. The classification of protists continues to be debated, and a standard outline of the kingdom Protista has not been established. The differences between the classification presented below and the classification presented in the article on protists (see protist: Classification) reflect the taxonomic variations that arise from individual interpretations.
Annotated classification
DIVISION CHLOROPHYTA (green algae)
Chlorophylls a and b; starch stored inside chloroplast; mitochondria with flattened cristae; flagella, when present, lack tubular hairs (mastigonemes); unmineralized scales on cells or flagella of flagellates and zoospores; conservatively, between 9,000 and 12,000 species.
Class Chlorophyceae
Primarily freshwater; includes Chlamydomonas, Chlorella, Dunaliella, Oedogonium, and Volvox.
Class Charophyceae
Includes the macroscopic stonewort Chara, filamentous Spirogyra, and desmids.
Class Pleurastrophyceae
Freshwater and marine; includes marine flagellate Tetraselmis.
Class Prasinophyceae (Micromonadophyceae)
Paraphyletic, primarily marine; includes Micromonas (sometimes placed in Mamiellophyceae), Ostreococcus, and Pyramimonas.
Class Ulvophyceae
Primarily marine; includes Acetabularia, Caulerpa, Monostroma, and sea lettuce (Ulva)
Oedogonium
Oedogonium thallus is a long, unbranched, filamentous structure consisting of a single row of elongated, cylindrical cells arranged end to end. The filament usually occurs attached with the substratum at thelower end by means of a basal cell, the rhizoidal cell or holdfast,expanded into a flattened disc with outgrowths. Certain cells in every filament possess one or more ring like markings of hemicellulose at their distal ends are called cap cells.