Why is there great phylogenetic diversity among phototrophic eukaryotes?

a. Their ancestor diverged early, allowing descendants more time to evolve apart.
b. Secondary endosymbiosis occurred several times.
c. Several kinds of cyanobacteria were engulfed.
d. Both a and b are correct.


Answer: B

Biology & Microbiology

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At high tide a coastal plant or animal cell will be in

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The fossil record resembles the living species in the same geographic area. How does this pattern support the theory of evolution by natural selection?

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Biology & Microbiology