ANATOMY

Detailed explanation-1: -A unicellular organism, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists of multiple cells. Organisms fall into two general categories: prokaryotic organisms and eukaryotic organisms.

Detailed explanation-2: -Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms include bacteria, protists, and yeast.

Detailed explanation-3: -While prokaryotes are always unicellular organisms, eukaryotes can be either unicellular or multicellular. For example, most protists are single-celled eukaryotes! Even though prokaryotes do not have a nucleus, they DO contain genetic information.

Detailed explanation-4: -Single-celled organisms are called unicellular organisms. All prokaryotic organisms such as Bacteria, Archaea are unicellular. A single cell performs all functions such as metabolism, excretion and reproduction. They reproduce by asexual means.

Detailed explanation-5: -When all the vital functions which are necessary for life are performed by a single cell then such cell is called the unicellular organism. Some examples of unicellular organisms are Amoeba, Paramecium etc.