Prokaryotic Vs. Eukaryotic Cells

Please view the two videos below as part of the Discussion Forum this week.
Prokaryotic Vs. Eukaryotic Cells (Links to an external site.)
RicochetScience. (2015, January 18). Prokaryotic Vs. Eukaryotic Cells. [Video].
Gram Positive vs Gram Negative Bacteria – Gram Staining Technique (Links to an external site.)
5MinuteSchool. (2017, July 4). Gram-Positive vs Gram-Negative Bacteria – Gram Staining Technique. [Video].
For this discussion forum, you will be comparing and contrasting prokaryote and eukaryote cells. You should address each of these points as part of your answers this week:
Identify if each cell type has a nucleus, chromosomes, and ribosomes.
Which was here first?
What is the significance of prokaryotes in regards to the origin of life?
How is gram staining used to identify bacteria?
What are some of the similarities and differences between gram-positive and gram-negative bacteria?