There are many fuels that produce energy. Some are:
- Coal
- Nuclear Energy
- BioFuel
- Oil / Gas
Hope this helps!
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Where are the options at and I'll see if I might be able to help or not.
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Having a cell membrane ,with pores; that regulates substances entering and leaving the cells;
cytoplasm;contains sugar and salts for maintaining it's osmotic pressure; also has a liquid medium; for all biochemical reactions;
having nucleus; contains chromosomes having heridetary material; and controls all activities of the cells.