Question

In which of the following organisms all the functions are performed by a single cell

• A. Protists
• B. Bacteria
• C. Virus
• D. All of the above

Answer 1

The correct option is D All of the above

A unicellular organism, also known as a single-celled organism, is an organism that consists of only one cell, unlike a multicellular organism that consists of more thanone cell. Unicellular organisms are so small that they must be seen with a microscope. Single celled organisms can be classified into 3 main categories: – Protists – Bacteria – Viruses. This single regulates all the functions of the cell like take in nutrients, convert the ntrients into energy, reproduction etc.Whereas in multicellular organisms like plants and animals different types of tissues are assigned different functions.