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.
A Hammerhead shark is a marine animal that is best known for its head which appears flat and bears a likeness to a hammer. The eyes are found wide-set on either side of the 'h â¦ ammer'. Most species of hammerhead are considered harmless to humans, however, the Great Hammerhead is potentially dangerous due to its size and ferocity.