2Perception of SmellPicture taken from: Neil Shubin’s Your Inner Fish, page 142
3Perception of SmellBrain’s single response to many signals sent by nerve cells interacting with molecules floating in the airCan sense 5-10,000 different odorsPicture:
4Jawless Fish vs. Mammals: Odor Genes Mammals = highly specialized animals, use sense of smell moreJawless Fish = Primitive, underwaterPicture: https://www.cdli.ca/courses/biol2201/unit02_org02_ilo05/b_activity.html
5Citations:Shubin, Neil. "Making Scents." Your Inner Fish: A Journey Into The 3.5-Billion-Year History Of The Human Body. New York: Pantheon, Print.Shubin, Neil. "Your Inner Fish: Teaching Tools." Tiktaalik Roseae: Home. University of Chicago, Web. 06 Sept <http://tiktaalik.uchicago.edu/book-tools.html>.