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Living Environment Regents June 2004 Question 19 |
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Correct Answer: (2) B→C→A
According to most scientists, life on Earth started between 3.5 to 4 billion years ago. The oldest available evidence for life appears to resemble bacteria, which is a simple, single-celled organism. Around 1500 to 500 years ago, the origin of multicellular organisms were believed to have existed with the evidences of oldest animal fossils. From then on, plants colonized the land, followed by the existence of other complex organisms, including the humans.
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