Why are mitochondria and chloroplasts believed to have entered early eukaryotic cells by endosymbiosis of bacteria?

A. They contain DNA.
B. They are the same size as bacteria.
C. They are not derived from the endomembrane system as other organelles are.
D. All of the choices are correct.


Answer: D

Biology & Microbiology

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Sequencing of HIV-1 revealed that it is most closely

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Which division of meiosis is referred to as 'reduction division?'

A. meiosis I B. meiosis II

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The cells that line the human respiratory passageways secrete

A) water. B) blood. C) hormones. D) mucus. E) enzymes.

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