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.
There Are 10 Species of Hammerhead Sharks The great hammerhead shark is just one of 10 species in the hammerhead group. Others are the bonnethead, mallethead, scalloped hammerhead, scoophead, smalleye hammerhead, smooth hammerhead, whitefin hammerhead, winghead, and the recently discovered Carolina hammerhead.