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.
Reproduction | Hammerhead Shark Facts For Kids. 1  The reproduction of hammerhead sharks takes place once a year. 2  The male sharks bite their females to prepare them for mating. 3  The hammerhead sharks give birth to live young babies. 4  The female sharks give birth to 12 â 15 pups. The Great Hammerhead sharks give birth to 20 â 40 pups.