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Chapter 29: Q. 24 (page 827)

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

Short Answer

Expert verified

The notochord in humans induces neural development and supports the developing embryonic body.

Step by step solution

01

Introduction

The notochord is a flexible, rod-shaped mesodermal structure that is found in the embryonic stage of all chordates and in the adult stage of some chordate species.

02

Explanation

In humans, the notochord is present only during embryonic development, at which time it induces the development of the neural tube and serves as a support for the developing embryonic body. The notochord is not found in the postembryonic stages, that is in adults it gets replaced by the vertebral column (that is, the spine).

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Most popular questions from this chapter

Hagfish, lampreys, sharks, and tuna are all chordates that can also be classified into which group?

a. Craniates

b. Vertebrates

c. Cartilaginous fish

d. Cephalocordata

Members of Chondrichthyes are thought to be descended from fishes that had ________.

a. a cartilaginous skeleton

b. a bony skeleton

c. mucus glands

d. slime glands

What are the characteristic features of the chordates?

What characteristics differentiate lizards and snakes?

Which of the following is part of a clade believed to have died out, leaving no descendants?

a. Paranthropus robustus

b. Australopithecus africanus

c. Homo erectus

d. Homo sapiens sapiens
See all solutions

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