Biology Illinois Edition (Glencoe Science)
7th Edition
ISBN: 9780078759864
Author: Alton Biggs
Publisher: MCG
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Chapter 27, Problem 17A
Summary Introduction
To determine: The structure located just below the nerve cord in chordates that enables invertebrate chordates to swim by moving their tails back and forth.
Introduction: Chordates are species belonging to the phylum Chordata that at some stage during their development have four distinctive characteristics-a dorsal tubular nerve cord, pharyngeal pouches, a notochord and a postanal tail.
Expert Solution & Answer
Explanation of Solution
The notochord is an elastic, rod-like structure, extending the body length. It lies just below the nerve cord of the dorsal tubular. The notochord is replaced by bone or cartilage in most vertebrate animals. The notochord persists in the chordate of vertebrate individuals. An animal having a notochord can create side-to-side body and tail movements, making fish-like swimming possible the first time in the history of evolution.
Conclusion
Thus, it concludes that the notochord is the device found in chordates just below the nerve cord allowing invertebrate chordates to move by flipping their tails back and forth.
Chapter 27 Solutions
Biology Illinois Edition (Glencoe Science)
Ch. 27 - Prob. 1ACh. 27 - Prob. 2ACh. 27 - Prob. 3ACh. 27 - Prob. 4ACh. 27 - Prob. 5ACh. 27 - Prob. 6ACh. 27 - Prob. 7ACh. 27 - Prob. 8ACh. 27 - Prob. 9ACh. 27 - Prob. 10A
Ch. 27 - Prob. 11ACh. 27 - Prob. 12ACh. 27 - Prob. 13ACh. 27 - Prob. 14ACh. 27 - Prob. 15ACh. 27 - Prob. 16ACh. 27 - Prob. 17ACh. 27 - Prob. 18ACh. 27 - Prob. 19ACh. 27 - Prob. 20ACh. 27 - Prob. 21ACh. 27 - Prob. 22ACh. 27 - Prob. 23ACh. 27 - Prob. 24ACh. 27 - Prob. 25ACh. 27 - Prob. 26ACh. 27 - Prob. 27ACh. 27 - Prob. 28ACh. 27 - Prob. 29ACh. 27 - Prob. 30ACh. 27 - Prob. 31ACh. 27 - Prob. 32ACh. 27 - Prob. 33ACh. 27 - Prob. 34ACh. 27 - Prob. 35ACh. 27 - Prob. 36ACh. 27 - Prob. 37ACh. 27 - Prob. 38ACh. 27 - Prob. 39ACh. 27 - Prob. 40ACh. 27 - Prob. 41ACh. 27 - Prob. 42ACh. 27 - Prob. 1STPCh. 27 - Prob. 2STPCh. 27 - Prob. 3STPCh. 27 - Prob. 4STPCh. 27 - Prob. 5STPCh. 27 - Prob. 6STPCh. 27 - Prob. 7STPCh. 27 - Prob. 8STPCh. 27 - Prob. 9STPCh. 27 - Prob. 10STPCh. 27 - Prob. 11STPCh. 27 - Prob. 12STPCh. 27 - Prob. 13STPCh. 27 - Prob. 14STPCh. 27 - Prob. 15STPCh. 27 - Prob. 16STPCh. 27 - Prob. 17STPCh. 27 - Prob. 18STPCh. 27 - Prob. 19STPCh. 27 - Prob. 20STP
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