How to make a timeline about the earth's evolution that describes the significance and formation of colonial organisms.

On your
timeline you would place the first colonial organisms at 233 million years BCE. "BCE"
means "before common era", and is how we represent in scientific terms how long ago
something happened. Colonial organisms are a step in the evolution from single-celled to
multi-cellular organisms. A colonial organism is defined as a 

collection of  genetically identical cells that are permanently associated but in which
little or no integration of cell activities occurs.

In
other words, colonial organisms are made of cells that are formed from the same, individual
cell, and live together permanently, but do not have any...

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  href="https://www.science20.com/adaptive_complexity/how_singlecell_organisms_evolve_multicellular_ones">https://www.science20.com/adaptive_complexity/how_singlec...