AP BIOLOGY

Detailed explanation-1: -As the name implies, unicellular organisms are made up of a single cell. They are the oldest form of life, with fossil records dating back to about 3.8 billion years ago. Bacteria, amoeba, Paramecium, archaea, protozoa, unicellular algae, and unicellular fungi are examples of unicellular 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: -Euglena is a unicellular organism. It is made up of a single cell that is capable of performing all the life processes required by it to survive.

Detailed explanation-4: -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.

Detailed explanation-5: -Organisms that are made up of more than one cell are known as multicellular. Multicellular organisms are said to be complex. As they are made up of many different cells. An example of a multicellular organism would be human beings.