Question

Approximately when did the first cellular forms of life originate according to the scientific evidence?

Options

• About 2000 million years ago

• About 3 billion years ago

• About 1 billion years ago

• About 4 billion years ago

Answer 1

The first cellular forms of life may not have originated until about 2000 million years ago. These were probably single-celled organisms and lived only in water, representing the development of more complex life forms after the initial chemical evolution phase.