Some green algae are unicellular

Green algae belong to Kingdom Protista. Green algae is a very diverse type of algae. Actually, green algae is sort of similar to plants. The green algae contain two forms of chlorophyll and capture light energy to produce sugar in similar with the plant. However, unlike the plants the green algae are aquatic. The species are named algae because they are aquatic and make their own food.

The scientific name for green algae is Chlorophyta.

Green algae is the oldest ancestor of all land dwelling (non-marine) plants.

I believe Green algae are members of the Protist family because they are plant like bacteria i believe but im not entirely sure