Explanation:
Chlorophyceae is an important class of green algae. They may be unicellullar, colonial, or filamentous. The main features of the class are the use of starch as the principal food reserve and the green chloroplasts with chlorophylls $\mathrm{a}$ and $\mathrm{b}$, in different species the chloroplast may be discoid, reticulate, cup shaped, spiral or ribbon-shaped.