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the earliest known life form were single celled organisms which roamed the earth they appeared around two billion years ago
Answer:
The Earth formed about 4.5 billion years ago. 700 million years later (3.8 to 3.5 billion years age) life started.
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∙ 14y ago
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What era did first life appear?
Pre-Cambrian. It's when bacteria first came about.
In what era did life first appear?
Pre-Cambrian. It's when bacteria first came about.
When did the first insect appear?
400 million years ago
When did mammals first appear on earth by paleontologists?
Mammals first appear in the fossil record of the Mesozoic Era.
What era did the first dinosaur appear in?
The first dinosaurs lived in the beginning of the Mesozoic Era (or the Age of Reptiles). Birds were amazingly discovered to be dinosaurs so dinosaurs were also alive in the Cenozoic (that's our time-the Age of Mammals) to today.
In what Era did the first land dwelling organisms appear?
the paleozoic era
In what era did the first forest appear?
Mesozoic
What era did the first forests appear?
Mesozoic
In what era did vertabrates appear?
Vertebrates first appeared during the Paleozoic era.
What era did saber-toothed cat first appear?
probably mesozoic era
When did flying insects first appear?
the cenozoic era
In what era did life first appear?
Pre-Cambrian. It's when bacteria first came about.
What era did first life appear?
Pre-Cambrian. It's when bacteria first came about.
What era did the first animals with both teeth and fins appear?
Silurian
When did cockroaches first appear?
Actually they were from the Pennsylvanian Period and the Paleozoic Era...
What era did large mammals first appear?
The Cenozoic era at about 65 million years ago. The Paleogene period.
What year did the first farms and villages appear?
9500 BC. When the switch between the Paleolithic Era to the Neolithic Era began.
