Write down the characteristic features of chlorophyceae.

Explanation

1. The members are commonly called ' Green algae' Most of the species - aquatic (Fresh water - Spirogyra, Marine - Ulva ). Few- terrsetrial (Trentipholia ).
2. Variation among the shape of the chloroplast is found in members of algae. It is cup Shaped (Chlamydomonas) , Discoid (Chara), Girdle Shaped (Ulothrix), Reticulate (Oedogonium), Spiral (Spirogyra), Stellate (Zygnema), Plate like (Mougeoutia).
3. Chlorophll 'a' and Chlorophyll 'b' are the major photosynthetic pigments.
3. Storage bodies called pyrenoids are present in the chloroplast and store starch. They also contain proteins.
5. The cell wall is made up of inner layer of cellulose and outer layer of Pectin.
6. Vegatative reproduction takes place by means of fragmentation and asexual reproduction is by the production of zoospores, aplanospores and akinetes.
7. Sexual reproduction is present and may be isogamous, anisogamous or oogamous. Eg: Chlorella, Chlamydomonas, Volvex, Spirogyra, Ulothrix, Chara and Ulva.