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Scientific consensus is that life occurred sometime between 4.4 and 3.5 billion years ago, the oldest evidence for life that has been preserved (and we have found) is in the 3,430-million-year-old Strelley Pool Chert from western Australia - obviously life must have started before this.
The earliest life forms on Earth are believed to have existed around 3.5 billion years ago in the form of simple single-celled organisms. These organisms were likely similar to modern-day bacteria or archaea.
The oceans are thought to be the first resource on Earth, scientists, maybe about a year or two ago had just discovered one of the oldest living DNA from a life form 3,000 feet below the surface somewhere located on the Pacific, or was it the Atlantic? Anyways, when the diver returned to the location of the creatures to take pictures, they showed the pictures and videos of the ocean dwellers on the morning news. They looked like gigantic swarming germs about the size of the palm of your hand, and some the size of your thumb. Scientists are still researching the creatures today and they probably will be for a long time, they think that they have been on Earth at least 1,000 years before dinosaurs.
-Smarty (:
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The earliest form of life appeared during?
The earliest form of life on Earth appeared approximately 3.5 billion years ago in the form of single-celled microorganisms. These simple life forms evolved into more complex organisms over time through processes such as natural selection and genetic variation.
What was the first life form on earth?
Cyanobacteria. was a late arrival.No one know what the first cells were nor do we understand their chemistry,but the most likely candidates were self reproducing proteins (like prions) somehow bound together.
What is the earliest span of time in earth history?
The answer is debated amongst geologists, astrologists and palaeontologists - the earliest period in life's history is the Archean eon, when the first proto-cells were thought to have formed. The earliest period there, is the Eoarchean - 4200 - 4400 million years ago. However, the earliest eon is the Hadean, which encompasses the formation of the Earth as celestial body 4600 million years ago, up to 4200 million years ago. The earth was formed by accretion (gravitational attraction of smaller bodies, to form a central object of greater mass, thus attracting more smaller bodies, and so on), within 10 - 20 million years, so, other than describing this period of Earth's history as 'Proto-Earth', there isn't really a way of classifying even earlier stages, unless you are willing to look into the stages of accretion in forming planets. (The earliest stage would probably be a 'proto-planetary disk' stage, which was itself formed as a by-product of the formation of the sun, followed by a kilometre-wide planetisimal, and then a Mars sized 'embryo', growing progressively. In this sense, the Earth and the Sun are descended from the same Giant Molecular Cloud, or GMC.)
Where was precambrian era?
The Precambrian era was a geological period that spanned from about 4.6 billion years ago to around 541 million years ago. It encompasses the earliest part of Earth's history, including the formation of the planet and the evolution of life forms. The Precambrian era was followed by the Paleozoic era, which marked the beginning of complex life on Earth.
Is zoologist physical earth or life science?
"life"
What was one of the earliest form of life?
Stromatolites are one of the earliest known life forms; some fossils may date back 3.5 billion years - before Earth had any oxygen in it's atmosphere.
Earliest life form come on Earth?
The earliest evidence of life on Earth comes from fossilized microorganisms that are approximately 3.5 billion years old. These microorganisms are simple bacteria-like organisms known as prokaryotes. They thrived in environments such as hydrothermal vents and shallow seas.
What was the earliest form of all life?
Cyanobacteria.
Among the earliest life-forms on Earth?
cyanobacteria
Among the earliest life forms on earth?
Cyanobacteria
What is The earliest life forms on earth lived?
The earliest ones still around are stromatolites, but there were lots of earlier life forms.
A life-form in the Precambrian time was?
One example of a life-form in the Precambrian time was cyanobacteria, which are ancient photosynthetic bacteria thought to be one of the earliest forms of life on Earth. Cyanobacteria played a crucial role in the Great Oxygenation Event by producing oxygen as a byproduct of photosynthesis, which significantly altered Earth's atmosphere.
What was the earliest form of multicelluar life on earth?
All land animals evolved from under the water. I would say fish and ammonites.
Did the earliest life forms of earth live on land or water or air?
The prevailing theory of the origin of life on earth posits that it began in the oceans.
The earliest life forms on earth lived where?
The earliest forms of life were microscopic autotrophs that lived in the great prehistoric oceans. Living under the water protected them from the deadly UV rays from the sun, as at this point Earth had not developed a suitable atmosphere. This is true everywhere but Kansas, where the earliest life forms were Adam and Eve. Zing!
Why have paleontologist not found any rocks from the earliest years of Earth?
It was to hot for rocks to form
How are hypotheses about earth's earliest life forms consistent with fossil fuels?
By creating the crust
