Sinauer Associates publishes collage level teaching books. To promote the title "Invertebrates" from Brusca, a sample chapter was made available as a pdf. Coincidental this is the chapter "The Protista", describing the Biology of eukaryotic unicellular organisms.
The chapter can be downloaded here:
http://www.sinauer.com/brusca/BruscaCh05.pdf
Regards,
Ecki
Free download of "The Protista"
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