Which of the following best describes the main idea of the endosymbiotic theory?

Modern day mitochondria evolved from simple prokaryotic cells taken up by larger prokaryotes.
Large prokaryotes ingested smaller eukaryotes that became modern-day chloroplasts.
Eukaryotic cells evolved from primitive mitochondria that engulfed ancient prokaryotes.
Ancient photosynthetic prokaryotic organisms evolved into modern ribosomes.

Question

Which of the following best describes the main idea of the endosymbiotic theory?

 Modern day mitochondria evolved from simple prokaryotic cells taken up by larger prokaryotes.
 Large prokaryotes ingested smaller eukaryotes that became modern-day chloroplasts.
 Eukaryotic cells evolved from primitive mitochondria that engulfed ancient prokaryotes.
 Ancient photosynthetic prokaryotic organisms evolved into modern ribosomes.

anonymous · Answer

the third option? euakryotic cells evolved from mitchondria that engulfed ancient prokaryotes?

anonymous · Answer

i did a project on this so i would definitely guess its the 3rd option

shreehari499 · Answer

I think its A

shreehari499 · Answer

80% sure

anonymous · Answer

yes youre right i just did a lil research and it is A

shreehari499 · Answer

in option 3 the word engulf does not make any sense...and endosymbiotic theory is base on certain organelles like mitochondria

anonymous · Answer

http://biology.kenyon.edu/HHMI/Biol113/the%20endosymbiotic%20theory.htm

anonymous · Answer

yeah this website matches with option a

shreehari499 · Answer

hmm...yeah