Answer:
Single celled organisms are made up of one cell, often microscopic and limited in size, able to meet all challenges of life with in one cell, and are able to differentiate to perform a specific job.
Explanation:
Singled celled organisms are usually, as the name suggests, single celled. To see one, you must use a microscope, and usually range anywhere from 0.5 to 10cm tall. A single celled organism can preform the necessary functions for life. They can eat, breathe, grow, and do other things other organisms with more than one cell.
