Cells differentiate in order to create cells that perform specific functions.
The ability to analyze DNA via DNA sequencing and other molecular analysis techniques has made it easier to group molecules into categories that represent lines of phylogeny.
Phylogeny is based on similar physical and genetic characteristics between organisms. Before such techniques, scientists were able to discern and group organisms only on the basis of their morphology, or their physical shape or appearance.
Initial conditions and chance play roles in the process of succession so if the ecosystem is in a good condition and chance is on it's side (no natural disasters or human interventions occur), succession can't happen because there is no destroyed area to build new upon.
I believe the answer is fossil fuels I hope this helps you out! :)
Anything that doesn't have to to with the living organisms or life in that sphere such as a rock or the dirt. It would help if you posted options. :) hope this helped
