ICANT writes:
Macro evolution is defined by Berekely as the changes above speciation. I have said and continue to say this has never been observed to happen. There is no first hand accounts. It can not be reproduced.
But it has been observed. Lines of
Drosophila used in research and teaching that are available from commercial biological supply labs across the country were derived from wild stock captured in southern California decades ago. In order to maintain genetic consistency it has not been desirable nor necessary to introduce infusions of wild stock. However, it has been found that many of the lines are no longer able interbreed with the ancestral populations, nor are separate laboratory lines able to interbreed.
But wait! There's more.
Apples were introduced to North America from Europe. They were first introduced to Massachusetts. From there they were introduced to the Ohio valley. Legend has it, by John Chapman (Johnny Appleseed). At any rate, this was done in the early 1800s. Since apple trees were not native, there were no native pests. However, in the 1850s, apple crops in Ohio began to be infested with worms. These are the larvae of what is now known at the apple maggot fly. This insect does not exist in Europe, the origin of apples, and had never existed in North America before. Research has shown that apple maggot flies are probably evolved from hawthorn maggot flies. They are almost identical but do not seem to interbreed. The breeding time of the two maggot flies is separated by several weeks and is synchronous with the fruit that they infest. The insects breed and lay eggs at the time that the host plant sets fruit.
Since then, similar infestations have happened in other introduced members of the Rosaceae family, such as pears and cherries. These are speciation events (macro-evolution) in progress. The insects no longer interbreed and have evolved to prefer a specific host.
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