Pete Posted January 24, 2009 Share Posted January 24, 2009 (edited) I'm confused about something. Its probably a mere problem of semantics but I figured I'd ask to make sure. The following site defines Gill slit (http://en.wikipedia.org/wiki/Gill_slit) as follows Gill slits are gills with individual openings rather than an outer cover. So gill slits are a type of gill. But at the bottom it says In the 19th century, gill slits of vertebrate embryos were erroneously thought to be actual gills, and thus evidence for the recapitulation theory. Those two statements taken together are confusing to me. gill slits of vertebrate embryos -Are they are or are they not gill slits? Is this an issue of semantics? Edited January 24, 2009 by Pmb Link to comment Share on other sites More sharing options...
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