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Most scientists believe that after the Earth was formed simple bacteria began to appear as the Earth cooled. Then the bacteria evolved into photosynthetic bacteria, a very simple form of plant, and into other single-celled organisms. These gradually became more complicated as they evolved over millions of years into plants and animals, and eventually after many more millions and even billions of years they eveolved into the plants and animals we know now.
Other people believe that the world was created by God or gods, and there are many, many religious theories as to the creation of the world.
There are other theories, both religious and non-religious but none have been proven so the matter is open to speculation.
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoWhen the planets had been around for a few billion years. In our time, roughly 3 billion or so years ago is when life first began.
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In art what is the texture that is suggested?
Boogers
What part of speech is suggest?
Suggested is a verb, the past tense and past participle of suggest. Example: He suggested many solutions to the problem.Past participles can be used as adjectives, as well. Example: a suggested solution to the problem.
Oparin suggested that the atmosphere was made up of what gases?
Oparin suggested that atmosphere was made up of gasses similar to ammonia, hydrogen, methane and water vapor.
How did the who get started?
they kept on saying the who as a joke until one of their friends suggested it
Was Leonardo da Vinci poisoned?
This has not been suggested by any reliable source.
Where have scientists begun a concerted search for life outside of Earth?
Mars
Who suggested that the Universe was filled with planets that harbor life?
paul
Who suggested that a president serve a life term?
alexander hamilton
What is suggested about the life of the imagination in the lady of shalott?
it isolates a person from reality.
When does biology begun?
biology is the study of life, so it has been around since man was created.
Which council was begun by Pope John XXIII to renew the life and mission of the Church?
Vatican II
Who was the philosopher who first suggested that life and liberty were fundamental rights?
John Locke
The area has begun to hurt. Is it begun or began?
Begun is correct.
Is it i have began or i have begun?
It is "I have begun."
What attitude toward the cycle of life is suggested by the passage?
it is natural,positive,and move forward
Online game quest for the after life?
ummmm? whoever suggested putting this question on the site was obviously bonked up. have a nice life,
What is Begun's population?
The population of Begun is 19,333.
