The endosymbiotic theory proposes that bacteria were engulfed by ancestral eukaryotic cells and sheltered within their cytoplasm whilst providing a survival advantage to the eukaryotic cell as well. Mitochondria and chloroplasts, now organelles, possess DNA with sequence homology to rickettsia and cyanobacteria, respectively. Which of the choices below best describes an organelle-like structure with a similar beneficial relationship when considering plant growth in nitrogen-limited soils?

Question

Quizplus · Accepted Answer

Bacteroids are a form of rhizobia bacteria that have been engulfed by legume root cells, forming a symbiotic relationship where the bacteroids fix atmospheric nitrogen into a form that the plant can use, aiding in its growth in nitrogen-limited soils.

The Endosymbiotic Theory Proposes That Bacteria Were Engulfed by Ancestral