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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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bromonox bromonox
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8 years ago
The earth is estimated to be approximately 4.6 billion years old.  Life appeared early in the history of Earth, but metazoans (multicelled organisms) did not appear until about 600 million years ago.  If the history of Earth were compressed into a single year, when would metazoans appear?
A) late September
B) mid-December
C) late January
D) late November
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Earth Science

Earth Science


Edition: 14th
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PulsaPulsa
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bromonox Author
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#2
8 years ago
Thx
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#3
5 years ago
i love this site it helps alot
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