Fossils are the preserved (1) ---- or traces
of animals, plants and other organisms.
They vary in size from microscopic, such as
single cells, to gigantic, such as dinosaurs.
A fossil normally preserves only portion of
the (2) ---- organism, usually that portion
was partially mineralized during life. Fossils may also (3) ---- of the marks left behind by the organism while it was alive.
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