â¢ SEMICOLON (noun) The noun SEMICOLON has 1 sense: 1. a punctuation mark (';') used to connect independent clauses; indicates a closer relation than does a period. Familiarity information: SEMICOLON used as a noun is very rare.
Cells are the building blocks of life. All living organisms are made up of cells. The cells were discovered by Robert Hooke in 1665. In the human body there are about 100 trillion to 1014 cells. hey are made up of a single cell. O rganisms like the amoeba, P aramecium are single-celled organisms, they are the oldest forms of life, they existed about 3.8 million years ago. Bacteria, a rchaea, protozoa, unicellular algae and un i cellular fungi are the main groups of unicellular organisms.
Body of the organism is made up of a single cell. The body of mutlicellular organism is made up of numerous cells. Body organization is simple. Organization is complex. The function of the whole organism is carried out by a single cell. Specialized functions are performed by different cells, tissues, organs or organ systems. Division of labor in the organism is at organelle level. Division of labor in the organism may be at cellular level, tissue level, organs and organ system level.