Question

Which of the following is ectodermal in origin?

(i)	Heart
(ii)	Sweat glands
(iii)	Adrenal medulla
(iv)	Middle ear
(v)	Urinary bladder
(vi)	Dermis of skin

Options

• ii and iii

• i and ii

• i, iv and v

• iii, iv and v

Answer 1

ii and iii

Explanation:

Sweat glands and adrenal medulla are ectodermal in origin, heart, middle ear, and dermis of skin are mesodermal in origin.