is algae unicellular or multicellular
One of the most common of the unicellular green algae is Chlamydomonas. It is rich in chlorophyll a and b and is found in soil, lakes and ditches. The cells are egg-shaped, and motile with two flagella. Each Chlamydomonas contains a large chloroplast and a pyrenoid which functions in production and storage of starch.
All brown algae are multicellular. Although some of the larger species such as the giant kelps appear to have stems and leaves, they are not true stems and leaves such as those found in the vascular plants, because they do not contain true vascular tissue.