Speciation has occurred when:
A. divergent populations evolve to the point where interbreedin...
Speciation has occurred when:
A. divergent populations evolve to the point where interbreeding does not produce viable, fertile offspring.
B. mutations in a population reach 100% of the organisms in that population.
C. organisms from a single species are separated by a physical barrier.
D. a DNA sequence is changed, resulting in an altered protein product.
E. an alteration in an organism's genetic material is made permanent.
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