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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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Brapbrap Brapbrap
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6 years ago

How many elements comprise 99 of all the mass of all living things on Earth?
  a. 4
  b. 9
  c. 11
  d. 15
  e. 23
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WilkinsonWilkinson
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6 years ago
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Brapbrap Author
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6 years ago
Thanks
brina10
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Yesterday
Helped a lot
jblazah
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2 hours ago
Good timing, thanks!
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