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Question

Match column I (germ layers) with column II (structures formed)
Column IColumn II
aEctodermiDermis of the skin,muscles, heart, lymph vessels etc
bEndodermiiLiver, pancreas, thyroid gland, thymus gland etc
cMesodermiiiEpidermis of skin, hair, nails, nervous system etc


A
a-i, b-ii, c-iii
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B
a-iii, b-ii, c-i
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C
a-ii, b-i, c-iii
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D
a-i, b-iii, c-ii
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Solution

The correct option is A a-iii, b-ii, c-i
After implantation the, Ectoderm is the outermost layer of the inner cell mass that forms the epidermis of the skin, hair, nails, nervous system etc.The endoderm is innermost layer of inner cell mass that differentiates into visceral organs and glands like the thyroid, thymus etc. The mesoderm layer lies between the ectoderm and endoderm and forms the dermis of the skin, connective tissue, heart, lymphatic vessels etc. 
So, the correct answer is ‘a-iii, b-ii, c-i’

Biology

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