The mechanism of sympatric speciation has been verified in hemp nettles by:
a. creating unique hybrids under laboratory conditions.
b. producing hybrids that were 98% fertile under laboratory conditions.
c. producing experimental hybrids that formed fertile offspring with the naturally occurring
hybrid.
d. producing experimental hybrids that could reproduce successfully with both parent
species.
e. creating hybrids that reproduced through the F4 generation before dying from hybrid
inviability
C
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