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.
Organisms that consist of more than one cell are known as multicellular organisms. Multicellular organisms are made up of more than one cell. These cells identify and attach to each other to form a multicellular organism. Most of the multicellular organisms are visible to the naked eye.Organisms like plants, animals and some algae arise from a single cell and they grow up into a multi-celled orgainsm.Both prokaryotes and eukaryotes show multicellularity.hese cells identify and attach to each other to form a multicellular organism. Most of the multicellular organisms are visible to the naked eye. Organisms like plants, animals and some algae arise from a single cell and they grow up into a multi-celled orgainsm. Both prokaryotes and eukaryotes show multicellularity.