The theory of endosymbiosis claims that millions of years ago, aerobic bacteria were taken inside of anaerobic cells through
endophagocytosis. The aerobic bacteria then fed on the half-digested food molecules in the cell's cytoplasm and gained a great
amount of energy, which, in turn, benefited the host cell.
Since both organisms benefited, they formed an endosymbiotic relationship, the bacteria evolved into organelles, such as
mitochondria and
chloroplasts, and the aerobic cells evolved into eukaryotic cells.
Which of the following can be cited as evidence for the theory of endosymbiosis?
OA. The ribosomes of chloroplasts are more similar in structure to ribosomes found in prokaryotes than to ribosomes found in
eukaryotes
OB. Mitochondria are typically above 50 microns in size, whereas edaryotic cells are typically smaller than 10 microns.
OC. Mitochondria contain multiple linear chromosomes similar to those found in eukaryotic cells.
OD. Eukaryotic cells appeared on Earth around 1.5 billion years ago, whereas chloroplasts appeared on Earth only 2.5 million
years ago.