The endosymbiotic theory to explain the origin of which structures? a.) mitochondria b.) ribosomes c.) nuclei d.) cell membranes

The correct answer is the option A which is mitochondria.

The endosymbiotic theory states that some organelles in cells are evolved from the ancient microorganism living in the cells and having symbiotic relationship with cell.

According to this theory, mitochondria in cells are considered as ancient aerobic bacteria because mitochondria have its own genome and produce energy.

yes it is weird but true

the energy generated by an individual's metabolism is calculated in met (metabolic equivalent of task). the met is the ratio of the work metabolic rate to the resting metabolic rate. one met is illustrated as 1 kcal per kilogram per hour, and is probably equal to the energy cost of sitting quietly.

1 met is equal to 1.162 watt per kg

1 kg is equal to 1000 grams

as the person weighs 80000 gm, that is, 80 kg.

therefore, 80*1.162 = 92.96

thus, the person expends 92.96 watts of power while at rest.