(a(i))[2]
Identify the letter on Fig. 2.1 used for the part of the eye that contains circular and radial muscles; has the highest concentration of light receptors.
(a(ii))[2]
On Fig. 2.1, draw and label the lens; draw and label the suspensory ligaments.
(a(iii))[3]
Explain what the suspensory ligaments do.
(b(i))[2]
Some people inherit a genetic condition known as cornea plana. This condition makes the cornea flatter than normal. Explain why a person with cornea plana cannot see some objects clearly.
(b(ii))[2]
A recessive allele causes one form of cornea plana. Two people without cornea plana have a child who has the condition. Explain how this can happen.