Please explain to me how the deuterostomes separated from the prototomes gradually. That macroevolutionary event involved an either-or situation. The blastopor on an animal's embryo can become either the mouth or the anus of the developing organism, not both.
Is it a fact that all non-macroevolutionary change must be gradual?
To answer the question above you would have to have a consistent meaningfull definition of what macroevolution is. As it is, macroevolution is useless ill-defined pointless term.
Makes the topic question "When does microevolution turn into macroevolution?" sound kinda stupid doesn't it?
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