Search for crossword answers and clues
Unicellular organisms are earliest forms of life
Answer for the clue "Unicellular organisms are earliest forms of life ", 7 letters:
archean
Alternative clues for the word archean
Word definitions for archean in dictionaries
Wikipedia
Word definitions in Wikipedia
The Archean Eon (, also spelled Archaean ) is a geologic eon , (that is, 4 to 2.5 billion years ago), following the Hadean Eon and preceding the Proterozoic Eon. During the Archean, the earth's crust and layers had just formed, making the Earth much cooler ...
WordNet
Word definitions in WordNet
adj. used of the earliest known rocks [syn: archaean ]
Usage examples of archean.
Others divide the Precambrian into two eras, the very ancient Archean and the more recent Proterozoic.
The Archean, composed of gneiss and crystalline schists, and traversed by eruptive veins, extends over the greater part of the Eastern Rumelian plain, the Rilska Planina, Rhodope, and the adjacent ranges.