PATHOLOGY

Detailed explanation-1: -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-2: -A unicellular organism is an organism that consists of a single cell. This means all life processes, such as reproduction, feeding, digestion, and excretion, occur in one cell. Amoebas, bacteria, and plankton are just some types of unicellular organisms.

Detailed explanation-3: -All species of animals, land plants and most fungi are multicellular, as are many algae, whereas a few organisms are partially uni-and partially multicellular, like slime molds and social amoebae such as the genus Dictyostelium.

Detailed explanation-4: -Life on earth evolved from a single cell millions of years ago. These single cells are known as unicellular organisms. All the life processes in a unicellular organism, including digestion, excretion, respiration, occur within a single cell. These cannot be seen by naked eyes and are hence called microorganisms.

Detailed explanation-5: -Living organisms which are made up of only a single cell are called unicellular organisms. Unicellular organisms are often observed under a microscope. They are too small to be seen with the naked eye. Eg., Amoeba, Chlamydomonas, bacteria etc.