Which of the following is non-flagellate in nature?

Step-by-step solution

Chlorella, Ulothrix, Spirogyra are non-motile, unicellular green algae. Chlorella consists of photosynthetic pigments-chlorophyll A & B present in its chloroplast. It is a very good source of protein and vitamins and is used as a food supplement. Ulothrix and Spirogyra are the filamentous forms of algae wherein the sexual reproduction take place with the help of flagellated gametes in Ulothrix and non-flagellated gametes in spirogyra. All the three algae are members of Chlorophyceae which are non-flagellated and no