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41.

Which of the following structures in our eye are not derived from ectoderm:

A.	Lens, retina, cornea, and conjunctiva	B.	Selerotic, choroids layer and pupil
C.	Iris, ciliary body and eye muscles	D.	Both of the structures in list (b) and (c)

42.

Heart and kidney in the frog are derived from mesoderm whereas the lungs are derived from:

A.	Ectoderm	B.	Endoderm
C.	Both (a) & (b)	D.	None of these

43.

Which of the following parts of excretory system are endodermal in origin:

A.	Kidneys	B.	Urinary bladder
C.	Both (a) & (b)	D.	None of these

44.

Which of the following parts in adrenal gland are mesodermal in origin:

A.	Medulla	B.	Cortex
C.	Both (a) & (b)	D.	None of these

45.

Which of the following structures in frog is ectodermal in origin:

A.	Epidermis	B.	Skin glands
C.	Dermis	D.	All of these

46.

Enamel found in our tooth is ectodermal in origin whereas dentine is:

A.	Totally ectodermal	B.	Totally mesodermal
C.	Partially endodermal	D.	Partially mesodermal

47.

Which of these endocrine glands is endodermal in origin:

A.	Pituitary gland	B.	Adrenal gland
C.	Thyroid gland	D.	Pineal body

48.

Total connective tissue present in our body is derived from:

A.	Ectoderm of the embryo	B.	Endoderm of the embryo
C.	Mesoderm of the embryo	D.	Ectoderm, endoderm and mesoderm

49.

Liver and pancreas are endodermal in origin whereas spleen is:

A.	Ectodermal	B.	Mesodermal
C.	Both (a) & (b)	D.	None of these

50.

Internal ear is derived from ectoderm of the embryo but middle ear and Eustachian tube are derived from:

A.	Endoderm of the embryo	B.	Mesoderm of the embryo
C.	Both (a) & (b)	D.	None of these