Give the diverse forms of thalli in green algae.

Explanation

The green algae (chlorophyta) show diverse forms of thalli ranging from unicellular to colonial to filamentous forms. The unicellular form is represented by the flagellated (motile) genera chlamydomonas and non motile genera chlorella. The cells of the colonial form - Volvox are bound together by protoplasmic connections. Filamentous unbranched form is represented by Oedogonium whereas branched filamentous forms are Cladophora, Pithophora and Fritschiella. The marine alga-Ulva, commonly called edible sea lettuce, is pseudoparenchymatous and leaf-like.