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.
Hammerhead Shark. There are eight different species of Hammerhead shark. All the species have the remarkable projections on both sides of the head, which probably is they reason why these sharks can detect electronic signals of no more than half a billionth of a volt.The head is probably used during electrolocation.ammerhead Shark. There are eight different species of Hammerhead shark. All the species have the remarkable projections on both sides of the head, which probably is they reason why these sharks can detect electronic signals of no more than half a billionth of a volt. The head is probably used during electrolocation.