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: -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-3: -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.

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.