What are the current infection rates of HIV across the globe?

Eukaryotic cells are theorized to have evolved from prokaryotes called the endosymbiotic theory. this explains that the most primitive eukaryotic cell engulfed a prokaryotic cell (by the process of phagocytosis) that is capable of cellular respiration and another prokaryotic cell that is capable of photosynthesis. these prokaryotic cells eventually became organelles and these organelles are the mitochondria and the chloroplast

Icant be totally sure but i would say with confidence that it is example #1 about cells.

Lipid because of the high percentage of carbon to carbon bonds, which store more energy than other bonds.