AP BIOLOGY

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: -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-3: -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-4: -Unicellular organisms can be protists, bacteria, and fungi. The cell of a unicellular organism is made up of a cell membrane and cytoplasm. These organisms have whip-like structures for movement and exchange materials with their external environment through diffusion.