It has been established that incremental changes led to the development of a human eye. Closely examine the stages of development as seen in slide 31 of the Changes lecture. Every stage can be represented by at least one living organism. Every stage can be an example of a genetic, environmental or genotype by environmental change. List out one representative living organism for each stage (a) through (e) in the slide.

a.) patch of pigmented cells

b.) eyecup

c.) pinhole camera-type eye

d.) eye with primitive lens

e.) complex camera-type eye