<span>A fossil leaf that is made only of carbon preserved between two rock layers is called carbon film fossil.
</span>Characteristic of the carbon film fossils is that they are primarily composed of carbon. The fossil leaf has usually lost <span>internal components (cell walls and internal cell structures ).</span>
The cytoplasm and the nucleus together are known as the protoplasm, the living matter of the cell.
I think the answer is Endospore. I'm sorry if I'm wrong...
I believe the answer you're looking for is cellular respiration.
