Question

which one of the following is a colonial algae.
a. oedogonium
b. microcystis
c. coleochaete
d. polysiphonia​

Answer 1

polysiphonia is a colonial algae ....

Answer 2

Coleochaeta is a colonial alga.

Colonial algae are those in which cells resembles free-swimming unicells which form groups. It may be either large and elaborately interconnected or small and simple.

Coleochaeta is a colonial green alga. It forms a flat thallus, the filaments in Coleochaeta radiate from a central point. Single parietal green chloroplast will be present in each cell.