In subsequent citations, only use the first author's last name followed by et al. in the signal phrase or in parentheses. (Kernis et al., 1993). In et al. , et should not be followed by a period.
Transcript of Hammerhead Shark Eyes. Structure of Eye. The structure of a hammerhead sharks eye is very similar to the human eye, they have a cornea, lens, retina, pupil and iris. Their retina has both cone and rod cells, which means they can see light, dark, and colours.
Unlike walleye and sauger, yellow perch. do not have canines (conical, pointed teeth). Instead, yellow perch have bands of brushlike. teeth on their jaws and on their palatines (roof. of their mouth). Yellow perch have ctenoid. scales (having a back margin with a comblike.