Question

Which of these is not a characteristic of the iris?

(a) It is opaque

(b) It is a part of the sclera

(c) It is a continuation of the ciliary bodies

(d) It is pigmented

I had been asked this question in a national level competition.

The above asked question is from Neural Control and Coordination topic in section Neural Control and Coordination of Biology – Class 11

Answer 1

Right option is (b) It is a part of the sclera

Best explanation: The iris is not a part of the sclera, but a part of the middle layer of the eye, known as the choroid. It is opaque, pigmented and forms the colored part of the eye. The iris is a continuation of the ciliary bodies.