of or relating to the highly metamorphosed rocks formed in the early Precambrian era
the earlier of two divisions of the Precambrian era, during which the earliest forms of life are assumed to have appeared
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Archaean cell walls do not have peptidoglycan, but they may have pseudopeptidoglycan, polysaccharides, glycoproteins, or protein-based cell walls.
From Textbooks ● Jun. 9, 2022
There is geological evidence that Earth’s oceans became salty early during the Archaean, and that at times in the past, they have been at least half again as salty as they are now.
From Textbooks ● Jan. 1, 2015
The team concluded that if the biggest imprints in the Ventersdorp rock were formed by the largest raindrops, air pressure in the Archaean could have been no more than twice what it is today.
From BBC ● Dec. 4, 2012
This "palaeobarometry" approach, revealed at the , will help constrain the models that try to simulate conditions in Archaean times.
From BBC ● Dec. 4, 2012
In Saxony also the upper Cretaceous beds rest directly upon the Palaeozoic or Archaean rocks.
From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 7 "Geoponici" to "Germany" by Various
Do archaean methanogens differ from other Archaea structurally, and if so, in what way?
From Textbooks ● Jun. 9, 2022
The cytoplasm of both bacterial and archaean prokaryotic cells has a high concentration of dissolved solutes.
From Textbooks ● Jun. 9, 2022
Do archaean methanogens differ from other Bacteria structurally, and if so, in what way?
From Textbooks ● Jun. 9, 2022
What is another question you might pose to learn more about the structural features that allow for the capture, storage, and use of free energy by archaean methanogens?
From Textbooks ● Jun. 9, 2022
Nor does it cease till the progress of the warmer day removes the northern ice-dam, sets free the flood, and the region of archaean rocks stands bare and dry.
From The Arctic Prairies : a Canoe-Journey of 2,000 Miles in Search of the Caribou; Being the Account of a Voyage to the Region North of Aylemer Lake by Seton, Ernest Thompson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
