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.
by Pe Tor. The hammerhead shark is quite well-known, but this doesnât detract from the fact that it is definitely one of the weirdest groups of sharks (there are actually 11 species of hammerhead). Again, its name is pretty suggestive and it refers to the incredibly bizarre shape of the sharkâs head.