Prokaryotes differ from eukaryotes in that they
a. have flagella.
b. lack DNA.
c. have chloroplasts and mitochondria.
d. lack a nuclear envelope.
e. have cell walls.
D; Prokaryotes do not have a well-developed endomembrane system, which means they do not have an organized nucleus (correct choice d) or organelles such as mitochondria and chloroplasts (choice c). Both groups have flagella (the rotary kind in prokaryotes and the whipping kind in eukaryotes), DNA, and cell walls (choices a, b, and e).
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