Based on the endosymbiotic theory, which explanation is supported by evidence for how eukaryotes evolved? *Engulfed means ‘to eat’

Question options:

A: Prokaryotic organisms engulfed* a virus and developed a symbiotic relationship which led to the evolution of organelles such as mitochondria and chloroplasts.

B: Organelles engulfed* a prokaryote and developed a symbiotic relationship which led to the evolution of organelles such as mitochondria and chloroplasts.

C: Prokaryotic organisms engulfed* a eukaryote and developed a symbiotic relationship which led to the evolution of organelles such as mitochondria and chloroplasts.

D: Prokaryotic organisms engulfed* another prokaryote and developed a symbiotic relationship which led to the evolution of organelles such as mitochondria and chloroplasts.

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.