According to the endosymbiotic theory,why was it adaptive for the larger (host)cell to keep the engulfed cell alive,rather than digesting it as food?
A)The engulfed cell provided the host cell with ATP.
B)The engulfed cell provided the host cell with carbon dioxide.
C)The engulfed cell allowed the host cell to metabolize glucose.
D)The host cell was able to survive anaerobic conditions with the engulfed cell alive.
E)The host cell would have been poisoned if it had digested the engulfed cell.

Question

Quizplus · Accepted Answer

The endosymbiotic theory proposes that a larger host cell engulfed a smaller cell, forming a symbiotic relationship that eventually led to organelles such as mitochondria and chloroplasts. These organelles provide the host cell with energy (in the form of ATP) through cellular respiration and photosynthesis, respectively. Therefore, it was adaptive for the host cell to keep the engulfed cell alive because it granted the host cell with a new source of energy.

According to the Endosymbiotic Theory,why Was It Adaptive for the Larger