Science Fair Project Encyclopedia
Biogenic substance
(Redirected from Biogenic)
A biogenic substance is a substance produced by life processes. It may be either constituents of, or secretions produced by plants or animals.
Examples
- Coal and oil are examples of constituents which have undergone changes over geologic time periods.
- Chalk, and limestone are examples of secretions (marine animal shells) which are of geologic age.
- Cotton and wood is are biogenic constituents of contemporary origin.
- Pearls, silk and ambergris are examples of secretions of contemporary origin.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details