Answer:
Plant life in ancient because if you compress plant hard enough it will turn into coal
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<span>Cells need a source of energy, they get this energy by breaking down food molecules to release, the stored chemical energy.This process is called 'cellular respiration'. The process is happens in all the cells in our body. Oxygen is used to oxidize food, main oxidized food is sugar(glucose).</span><span>Jan 14, 2009</span>
The Cambrian Explosion is when diverse animals were first recorded as fossils.
