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.
World's Deadliest: Hammerhead Sharks Sharks This shark's distinctive head is designed for greater agility and panoramic vision, making the hammerhead a hunter to be reckoned with. Transcript In the ocean, hammerhead sharks prowl with some of the most amazing eyes in the natural world. The bizarre head that gives this predator its name...has been the source of fascination...and bewilderment.