Which of the following organisms does not exist as a single free living cell?
Answer Details
All of the given options are unicellular organisms and exist as single free-living cells, except for Volvox.
Volvox is a colonial organism, which means it consists of many individual cells that live and work together as a unit. Each cell in the colony performs a specific function, such as reproduction, movement, or photosynthesis. The cells are connected by thin strands of cytoplasm, which allow them to communicate and share nutrients. Although Volvox appears to be a single organism to the naked eye, it is actually a collection of many individual cells that work together for the survival of the colony.