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The earth became habitable about 4.3 billion years ago and the first cell appeared. When the earth was young, there wasn't enough oxygen in the atmosphere but bacteria produced oxygen and ice age started about 3.5 billion years ago. Ice steadily melted and multicellular lives appeared about 2.7 billion years ago just after the end of ice age.
What else can I help you with?
When did first organism appear on earth?
Read your science book chapter . It is on the first page.
Did god used science to create life?
No! First He created life then later created science
What after BSC in life science should one choose to do other then MBA?
You can do MSC or can appear for Competitive Exams.
What era did first life appear?
Pre-Cambrian. It's when bacteria first came about.
Can a candidate appear for science if he has passed in hsc commerce.?
can a candidate appear for science if he has passed hsc commerce
What are the evidences that science came first before technology?
Science came first. Applying known scientific techniques for the betterment of daily life is known as technology.
What is importance o science in daily life?
From the first stone tool it MADE your daily life.
Do infants with Canavan disease appear normal?
Most infants with Canavan disease appear normal for the first month of life
In which episode Vicki first appear on Life With Derek?
the wedding episode your welcome
Who was the first African-American to appear on the cover of Life Magazine?
jakey chaney
What was the first African American to appear on the cover of Life magazine?
jakey tane
What will appear in general science?
qwerty
