A eukaryotic cell organelle is found to have its own DNA and to make some of its own ribosomes. It also can make some protein without the help of DNA in the cell's nucleus. Propose an explanation for the origin of this organelle
A) intracellular evolution from latent bacterial DNA
B) symbiotic merger of bacteria into a eukaryotic cell with the bacterial cell becoming the organelle
C) symbiotic merger of two bacteria cells; one becoming the nucleus, the other becoming the organelle
D) viral transmission of DNA from a bacterium to a eukaryotic cell
Answer: B
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Which statement would not be supported by Darwin's concept of evolution?
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In a polar covalent bond,
A) an acid and a base neutralize each other to form a salt. B) electrons are shared equally between two atoms. C) electrons are transferred from one atom to another. D) electrons are shared unequally between two atoms. E) electrons are shared unequally between more than two atoms.