Which of the following organisms is one-celled and free-living? by Sunday | Jun 24 | Biology WAEC | 0 comments A. Volvox B. Spirogyra C. Rhizopus D. Chlamydomonas E. Hydra Correct Answer: Option D – Chlamydomonas Users Also Read These:Which of the following relationships does not…Which of the following organisms is both parasitic…The factors which affect the number and the…Which of the following organisms feeds both…Which of the following organisms serves as host to…