Glencoe Biology (Glencoe Science)
12th Edition
ISBN: 9780078945861
Author: Alton Biggs
Publisher: MCG
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Chapter 27, Problem 32A
Summary Introduction
To write:The larvae of organisms help scientists classify and determine the phylogeny of animals
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 fishlike lancelets are closely related to saclike, sea squirts because of their dorsal tubular nerve cords, pharyngeal gill slits, notochords, and postanal tails, even if sea squirts have all these features only in their larvae. The notochord that flexible tough rod, provided support for the animal, and it also provided a place for muscles to attach. With this arrangement, chordates could swing their backs from side to side and swim through the water, a key development in the evolution of chordates.
Conclusion
Thus, it concludes thatwith this arrangement, chordates could swing their backs from side to side and swim through the water, a key development in the evolution of chordates.
Chapter 27 Solutions
Glencoe Biology (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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