(a) (i) In dim light, pupil becomes large
(ii) In bright light, pupil becomes small
(b) ( i) Cones
(ii) Rods
(iii) Cones
(a) (i) In dim light, pupil becomes large
(ii) In bright light, pupil becomes small
(b) ( i) Cones
(ii) Rods
(iii) Cones