Cyanobacteria use water, carbon dioxide, and sunlight to create their food, and expel oxygen as a by-product. The real significance of stromatolites is that they are the earliest fossil evidence of life on Earth. ... They were the first known organisms to photosynthesis and produce free oxygen.
A is the answer or d is the answer
They used dry farming and flood irrigation.
<span>England was distracted, and the colonies were largely left to their own devices during the civil war in England.
During the English civil war, England let the colonies alone for twenty years. England was consumed with and distracted by domestic matters. This gave the colonies some independence to form a new land, with new ideas, and emerging political philosophies.</span>
The unemployment rate is measured by a division of the department of labor known as the bureau of labor statistics or BLS this government agency conducts
