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5 February, 04:18

The colonization of land by animals: took place billions of years ago. was made easier by high atmospheric levels of carbon dioxide. preceded the presence of plant species on land. may have taken place independently by a variety of species descended from aquatic ancestors.

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  1. 5 February, 04:34
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    Answer: the correct answer may have taken place independently by a variety os species descended from aquatic ancestors.

    Explanation:

    Scientists think that life started in the oceans as early as 4 to 4.2 billion years ago.
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