The Brain,spinal Cord,and Lens and Cornea of the Eye Develop

Question

The brain,spinal cord,and lens and cornea of the eye develop from the primary germ layer called the
A) ectoderm
B) mesoderm
C) endoderm
D) none of the above

Accepted Answer

The ectoderm is the primary germ layer that develops into the nervous system, including the brain and spinal cord, as well as the lens and cornea of the eye. The mesoderm primarily develops into muscle, bone, and connective tissue, while the endoderm develops into the lining of the digestive and respiratory systems. Therefore, the correct choice is A) Ectoderm.