The interphase is the stage, in which the cell is not dividing. Teh genetic material in this stage is present as chromatin and the nuclear envelop remains intact, making the appearance as a darkly stained center. the nucleolus is also visible.
The prophase is the first stage of the mitosis, at this stage the genetic material starts condensing. the nucleolus starts fading away due to its degradation. the genetic material appears condensed and starts taking the shape of the chromosomes. The nuclear envelope is degraded, which makes the visibility of the chromosome easier.
The oldest fossils would be at the bottom, while the youngest would be closer to the surface.
The top level of the pyramid
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