Which came first plants or animals?

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Have you ever wondered what it must have been like millions and millions of years ago when the Earth first came into existence? Where there plants and animals then?

It is estimated that the first life on earth were primitive one celled organism that appeared about 3 billion years ago in the oceans. These single celled organism gradually became multicellular organisms. In time the oceans began to fill up with more complex forms of life.

One of the first form of life was very simple plant called algae. Different types of plants came later on. Animal Life appeared only after the appearance of plant life.

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