Question

Skeleton and muscles in a vertebrate embryo develop from

• A. Ectoderm
• B. Mesoderm
• C. Endo-mesoderm
• D. Endoderm

Answer 1

Answer: (B)

Mesoderm

There are three germ layers: ectoderm, mesoderm, endoderm. Each germ layer give rise to specific tissues, organs and organ systems of the young one to be developed.

A. Ectoderm- It give rise to epidermis of skin, medulla of adrenal gland, posterior and intermediate lobes of pituitary gland, pineal gland.

B. Mesoderm- It produces dermis of skin, most muscles, connective tissues, cortex of adrenal glands, most of skeleton, dentine of teeth.

C. Endoderm- lining of trachea, bronchi and lungs, lining of urinary bladder, lining of middle ear.

So, the correct answer is 'Mesoderm'.