1. Surface ectoderm forms the following structure EXCEPT:

a. sclera

b. conjunctiva

c. cornea

d. lacrimal glands

e. eyelid

AnswerAnswer: a

Sclera is derived from the mesoderm.

..

2. Neural crest cells give rise to the following EXCEPT:

a. corneal stroma

b. corneal endothelium

c. choroidal stroma

d. uveal melanocytes

e. temporal sclera

AnswerAnswer: e

The temporal portion of sclera is derived from

the mesoderm.

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3. The lens is derived from:

a. mesoderm

b. neural crest cells

c. neural ectoderm

d. surface ectoderm

e. endoderm

AnswerAnswer: d

.

4. The first cell in the eye to produce melanin is:

a. iris melanocyte

b. retinal pigment epithelium

c. uveal melanocyte

d. dendritic cells of the eyelid

e. conjunctival melanocyte

AnswerAnswer: b

RPE cell is also the first cell in the body 

to produce melanin.

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5. The mesoderm gives rise to:

a. trochlea

b. nasal sclera

c. endothelia of the blood vessels

d. lens

e. corneal stroma

AnswerAnswer: c

The mesoderm gives rise to endothelia 

of the blood vessel, the temporal sclera, 

extraocular muscles and part of the 

vitreous.