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.
Now there are a few different types of hammerheads, but the Great Hammerhead is by far the largest of the nine species of this shark. In fact, these hammerheads can grow up to a length of 20 feet (5.5 m), and they can weigh up to 1,000 pounds (450 kg)!The coloration of the Great Hammerhead can range from gray-brown to green on their dorsal sides, and off-white on their ventral sides, and their teeth are extremely jagged and triangular.he most well known factor about them would undoubtedly have to deal with their namesake. These sharks have flat, T-shaped heads that make them stand out from other sharks. Many people are highly intrigued and curious about the shape and benefits of the Hammerhead Sharkâs head.