Corneal transplantation is highly successful because:

Identify the correct sequence of cells in the retina from the outside to the inside.

Rhodopsin is a ...... coloured protein.

What is the approximate number of cones in each human eye?

Good vision depends on adequate intake of carotene-rich food. Select the best option from the following statements:
$(1)$ Vitamin $A$ derivatives are formed from carotene.
$(2)$ The photopigments are embedded in the membrane discs of the inner segment.
$(3)$ Retinal is a derivative of vitamin $A$.
$(4)$ Retinal is a light-absorbing part of all the visual photopigments.

The part of the rabbit's eye that acts as the screen of a camera is the........