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What life form lived during the precambrain time?
Simple life forms appeared around 3.85 billion years before present. By 3.5 billion years, cyanobacteria were forming stromatolites in the rock record. Late in the Precambrian, the Ediacara fauna appears around 580 million years before present.
How many years were prokaryotes present on earth before the eukaryotes?
* 3.5 billion years ago the first life arose: prokaryotic bacteria * 1.5 billion years ago eukaryotic cells arose Therefore, prokaryotes were present on earth for 2 billion years prior to the emergence of eukaryotic life.
Prokaryotes were presented on earth how many more year before eukaryotes?
* 3.5 billion years ago the first life arose: prokaryotic bacteria * 1.5 billion years ago eukaryotic cells arose Therefore, prokaryotes were present on earth for 2 billion years prior to the emergence of eukaryotic life.
Was ozone present in the early atmosphere?
2.3 billion years ago marks the Great Oxidation Event (before life is expected to have climbed onto land). At this time, there would have been an ozone layer. yes, the ozone is needed for life
How does Megalencephaly typically present?
The disorder typically presents as a large head circumference (distance around the head) either prenatally (before birth), at birth, or within the first few years of life
What is the average life expectancy for a woman at present in the United States?
The average life expectancy for a woman in the United States is 69 years.
What is the present length of US copyright ownership?
Term of copyright is for the life of the creator plus 70 years.
How many years did earth exist before there was evidence of life on?
Earth is estimated to be around 4.6 billion years old, and evidence of the first life forms dates back to about 3.5 billion years ago, in the form of fossilized microorganisms. This means there were around 1.1 billion years of Earth's existence before evidence of life appeared.
What is the life span of a snow leopord?
Not enough research is present to guess. In zoos, they can live to be 21 years old.
What was the life expectancy for humans before world war 2?
63 years
What is the number of years in a life sentence in Georgia?
In Georgia, a life sentence typically means a minimum of 30 years in prison before becoming eligible for parole.
How long is the half life of radioactive water?
The half-life of radioactive water depends on the specific isotope present in the water. Common radioactive isotopes found in water include tritium and carbon-14, which have half-lives of about 12.3 years and 5,730 years, respectively.
