They are organelles of symbiotic origin:
Correct answer: C. Chloroplast & mitochondria
- A. Nucleus & mitochondria
- B. Golgi apparatus & Endoplasmic Reticulum (ER)
- C. Chloroplast & mitochondria
- D. Cilia
Explanation
The endosymbiotic hypothesis suggests that mitochondria and chloroplasts originated from free-living bacteria that established a symbiotic relationship with an ancestral eukaryotic host cell. Over time, these bacteria evolved into the organelles we know today. Mitochondria are believed to be derived from aerobic bacteria that could perform cellular respiration, while chloroplasts are thought to have evolved from cyanobacteria capable of photosynthesis. The nucleus, Golgi apparatus, ER, and cilia do not share this symbiotic origin, which is why options involving these organelles are incorrect.
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About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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