A) endoderm
B) ectoderm
C) mesoderm
D) corneous layer
Correct Answer: A
Solution :
The wall of the eye ball of frog is made up of three concentric layers : sclerotic, choroid and retina. Sclerotic is an outer, thick, protective coat. It is made up of tough fibrous connective tissue and cartilage. In frog the sclerotic layer is formed from endoderm.You need to login to perform this action.
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