When hybrids in a hybrid zone can breed with each other and with both parent species and also have equal fitness to the parent species, one would predict that __________.
a. the hybrid zone will remain stable
b. reinforcement of reproductive barriers will keep the parent species separate
c. the species will fuse
d. allopatric speciation will occur
e. a new hybrid species will form by sympatric speciation
Answer: c. the species will fuse
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