Question

What is the structural advantage of the notochord in the human embryo? Be sure to compare the notochord with the corresponding structure in adults.

a) It provides structural support; in adults, it is replaced by the vertebral column.
b) It develops into the vertebral column; in adults, it becomes the spinal cord.
c) It assists in nerve development; in adults, it becomes the brain.
d) It aids in locomotion; in adults, it becomes the tailbone.

Answer 1

The notochord provides structural support to the human embryo during development, but it is replaced by the vertebral column in adults.

Step-by-step explanation:

The notochord is a flexible, rod-shaped structure found in the embryonic stage of all chordates, including humans. It is located between the digestive tube and the nerve cord and provides structural support to the developing embryo. However, in adults, the notochord is replaced by the vertebral column, also known as the spine. The vertebral column provides more rigid support and protection to the spinal cord.